WASHINGTON -- Casino billionaire Sheldon Adelson, whose net worth makes him one of the world's richest men, is on a check-writing spree that will soon bring his total political contributions in this election cycle to at least $71 million, according to sources familiar with his spending. That money is spread across the spectrum of GOP super PACs, which are required to disclose donors, and nonprofits, which are not.

Adelson and his wife, Miriam, along with other family donations, have already reached $36 million, including $10 million to the Romney-backing super PAC Restore Our Future that was reported this week. But two GOP fundraisers familiar with his plans say that Adelson has given or pledged at least $35 million more to three conservative nonprofit groups: the Karl Rove-linked Crossroads GPS, another with ties to billionaires Charles and David Koch and a third with links to House Majority Leader Eric Cantor (R-Va.).

Adelson, 78, is a staunch supporter of the Israeli right and a strong foe of American unions. In recent years, Adelson has been a major financier of GOP-allied groups, but has emerged this year as the consummate super donor in the wake of 2010 court rulings that permitted corporations, unions and individuals to supply unlimited amounts of money, sometimes anonymously, to independent groups that can advocate directly for candidates.

Adelson has told friends that he might give as much as $100 million in donations this year in support of GOP candidates and conservative issues. That target now seems easily within reach and could be surpassed, say the two GOP fundraisers with ties to the casino magnate.

Crossroads GPS -- founded by GOP consultants Rove and Ed Gillespie in 2010 alongside the super PAC American Crossroads -- could wind up as the major recipient of the casino titan's largess, due to Adelson's longstanding and close ties to Rove. Crossroads GPS has already received one $10 million cash infusion this cycle from Adelson, who, according to the two GOP fundraisers, recently committed to another donation of the same amount.

The fundraisers said that Adelson also recently committed to sending $10 million to a nonprofit with links to the billionaires Charles and David Koch. In January, Adelson for the first time attended one of the semi-annual conferences that the billionaire brothers host for wealthy conservatives to tout their favorite political projects. It's not known which of several Koch-affiliated nonprofits Adelson is expected to support, but the two biggest this year are expected to be the Koch-founded group Americans for Prosperity and the Arizona-based Center to Protect Patient Rights, which in 2010 was used as a conduit to send tens of millions to other conservative bastions, according to tax records filed with the IRS.

Additionally, Adelson has committed $5 million to the Young Guns Network, a nonprofit group set up by former aides to Cantor, with whom Adelson is close and who, like the casino magnate, is a high-profile player in conservative Jewish circles. Adelson gave another $5 million earlier this spring to super PAC the Congressional Leadership Fund, which has ties to House Speaker John Boehner and whose intent is to ensure that the GOP keeps control of the House.

The two fundraisers who spoke with The Huffington Post requested anonymity because they're not authorized to discuss publicly the donations of Adelson, whose net worth is just shy of $25 billion according to Forbes, placing him at number eight on the list of the richest Americans and 14th richest in the world.

Adelson is chairman of the Las Vegas Sands, a sprawling casino empire with a hugely lucrative gambling operation on the Chinese island of Macau, the only legal hub for gambling in that country.

The Sands reported in a filing with the Securities and Exchange Commission early last year that it was under investigation by both the agency and the Department of Justice for possible violations of the Foreign Corrupt Practices Act, which bars bribery to win business overseas.

A spokesman for the Las Vegas Sands and Adelson did not return several calls seeking comment about Adelson's political contributions. A Sands spokesman told this reporter for articles written for the Center for Public Integrity that it was cooperating with federal officials and that the company did nothing improper or illegal.

According to an interview with Forbes several months ago, Adelson's huge political investment this year has been driven heavily by his dislike for President Barack Obama's policies, both economic and foreign, especially those pertaining to the Middle East.

After weeks of speculation about when Adelson would help Romney-affiliated super PAC Restore Our Future, Adelson and his wife came through this week with a $10 million cash infusion, making the casino mogul the largest backer of the independent committee, which prior to his contribution had raised over $50 million.

In late May, Romney met with Adelson privately when the candidate was in Las Vegas to attend a fundraiser hosted by real estate mogul Donald Trump.

Adelson's support for Romney comes after he and his family spent some $21.5 million on the super PAC Winning Our Future in support of his favored GOP presidential candidate, Newt Gingrich, who withdrew from the race in early May. Adelson had initially backed Gingrich, an old friend who shared his hawkish views on the Middle East and other issues, and the casino baron early on suggested that Romney was not as decisive in his views as the Georgian. But as the odds of a Gingrich nomination dimmed, Adelson sent strong signals that he would back Romney with major funding for his super PAC.

Although the latest big donation to the Romney super PAC is public information (the group is required to report its funding to the Federal Election Commission), Adelson has indicated to GOP colleagues that he plans to give the lion's share of his contributions to nonprofits like Crossroads GPS, which can legally keep donations secret because they're classified by the IRS as social welfare organizations.

Adelson is well known for his deliberative, hands-on style in making big donations, a trait that has sometimes frustrated would-be suitors. The recent $10 million donation to the Romney super PAC came after a lengthy courtship by the candidate, who by law is not allowed to solicit unlimited funds, but only up to $5,000, as campaigns and outside groups are barred from coordinating their activities.

GOP fundraisers say that pilgrimages and conference calls to Las Vegas by prominent politicos and groups seeking large donations from Adelson have been frequent this year. Recently the U.S. Chamber of Commerce has been talking with Adelson about a sizable cash infusion as part of an effort to raise at least $50 million for ads in support of GOP congressional candidates.

Other groups are also banking on Adelson for major contributions, such as the nonprofit Republican Jewish Coalition, which has in recent years received millions of dollars from Adelson, say GOP fundraisers. Matt Brooks, the executive director of the RJC, told this reporter in late 2011 for an article for the Center for Public Integrity that the group expects to spend about $5 million this year on ads and other efforts in state races, such as the Ohio Senate race in which State Treasurer Josh Mandel, who is also Jewish, is vying to unseat incumbent Democratic Sen. Sherrod Brown.

Meanwhile, Adelson has dropped big checks on others of this year's major state-level battles. Adelson donated $250,000 to help Wisconsin Gov. Scott Walker (R) defeat a recall vote that was seen as a testing ground for GOP efforts in the fall. And Adelson also kicked in $250,000 to a political committee tied to Florida Gov. Rick Scott (R), who is fighting Washington over his state's efforts to purge non-citizens from its voting rolls.

In his Forbes interview, Adelson gave a glimpse into his conservative political views, declaring that "what scares me is the continuation of the socialist-style economy we've been experiencing for almost four years."

"I'm against very wealthy people attempting to or influencing elections," he said. "But as long as it's doable, I'm going to do it."

See a gallery of the biggest Super PAC donors of 2012:

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  • Sheldon Adelson And Family (R)

    Sheldon Adelson, the Las Vegas casino magnate, and his family have combined to give $53.69 million to super PACs in the 2012 election cycle. At first, Adelson pumped money into Winning Our Future, the super PAC supporting Newt Gingrich, but now he is funding groups backing Mitt Romney and congressional Republicans. Adelson is ranked on the <em>Forbes</em> list of the richest Americans at number eight, with $21.5 billion in net worth. Sheldon Adelson and his wife, Miriam, gave $15 million to Winning Our Future. His daughters Sivan Ochshorn and Shelley Maye Adelson each chipped in $500,000. Another daughter and her husband each gave $250,000. Adelson and his wife have also given $20 million to Restore Our Future (supporting Romney), $5 million to Congressional Leadership Fund, $5 million to YG Action Fund, $2 million to Freedom PAC (supporting Connie Mack), $1.5 million to Independence Virginia PAC (supporting George Allen), $1 million to Ending Spending Action Fund, $1 million to Treasure Coast Jobs Coalition, $1 million to Patriot Prosperity PAC (supporting Shmuley Boteach for Congress) and $250,000 to Conservative Renewal PAC, $250,000 to Texas Conservatives Fund (both supporting David Dewhurst) and $190,000 to Hispanic Leadership Fund. Adelson remained in the number one spot among super PAC donors after counting contributions for August. He has allegedly <a href="http://www.huffingtonpost.com/2012/06/16/sheldon-adelson-to-lavish_n_1600149.html">given in excess of $70 million</a> when contributions to non-profit groups like Americans for Prosperity and the Republican Jewish Coalition are included. His involvement in politics revolves around his support for the state of Israel, <a href="http://www.huffingtonpost.com/2012/01/11/sheldon-adelson-newt-gingrich-israel_n_1195867.html" target="_hplink">in particular the policies of Prime Minister Benjamin Netanyahu</a>. His business, along with that of other super PAC donors, <a href="http://www.huffingtonpost.com/2012/06/18/sheldon-adelson-bribery-super-pac-donors-fcpa_n_1602694.html" target="_hplink">is also under investigation</a> for violations of the Foreign Corrupt Practices Act.

  • Harold And Annette Simmons (R)

    Harold Simmons, the octogenarian Dallas businessman, combined with his wife Annette and his company, Contran Corp., to donate $26,765,000 to super PACs. Simmons is listed in <em>Forbes</em> magazine as the 33rd richest person in America with a net worth of $9.3 billion. Simmons and Contran donated $19.5 million to American Crossroads, $2.3 million to Restore Our Future (supporting Mitt Romney), $1 million to Make Us Great Again (supporting Rick Perry), $1.1 million to Winning Our Future (supporting Newt Gingrich) and $100,000 to Restoring Prosperity Fund (formerly Americans for Rick Perry). Annette Simmons gave $1.2 million to Red White And Blue Fund (supporting Rick Santorum). Simmons has also given $1.1 million to Texas Conservatives Fund and $500,000 to Conservative Renewal PAC, both super PACs supporting Senate candidate David Dewhurst. He gave another $50,000 to Strong Utah PAC, $10,000 to Conservatives Action Together and $5,000 to Freedom PAC, which supports Connie Mack for Senate in Florida. Simmons -- who explained that he is contributing money to super PACs to <a href="http://www.huffingtonpost.com/2012/03/22/harold-simmons-obama_n_1371642.html">stop "that socialist," President Barack Obama</a> -- remains in second place among super PAC donors.

  • Bob Perry (R)

    Texas homebuilder Bob Perry contributed $21,465,000 million to super PACs. Perry is one of the most prolific donors in contemporary political history. He was a major backer of Swift Boat Veterans for Truth, the outside group that helped torpedo John Kerry's presidential campaign in 2004. Perry's net worth has been estimated at around $650 million. Perry has given $10 million to Restore Our Future (supporting Romney), $7.5 million to American Crossroads, $1 million to Congressional Leadership Fund, $1 million to Club for Growth Action, $750,000 to Independence Virginia (supporting George Allen), $500,000 to Texas Conservatives Fund (supporting David Dewhurst), $250,000 to Freedom PAC, $100,000 to Make Us Great Again (supporting Rick Perry, who is of no relation) and $15,000 to Maverick PAC.

  • J. Joseph Ricketts (R)

    J. Joseph Ricketts, the founder of TD Ameritrade and head of the family that owns the Chicago Cubs, has given $12.85 million to super PACs. Ricketts ranked 371 on <em>Forbes'</em> list of richest Americans in 2009, with a net worth of $1 billion. He has donated $12.25 million to his own super PAC, Ending Spending Action Fund. Ricketts has also given $500,000 the Campaign for Primary Accountability, a super PAC supporting challengers to incumbent Democrats and Republicans in contested congressional primary elections, and $100,000 to Restore Our Future (supporting Romney). Ricketts <a href="http://www.huffingtonpost.com/2012/05/17/joe-ricketts-jeremiah-wright-super-pac-ad_n_1525658.html" target="_hplink">became the focus of controversy</a> in May 2012 after the New York Times revealed that he was considering a proposal to fund, through a super PAC, advertisements attacking President Barack Obama with his relationship with his former pastor, the controversial Jeremiah Wright. After the publicity Ricketts and the consultants involved all stated that they were not going forward with the plan.

  • Fred Eychaner (D)

    Fred Eychaner, the Chicago-based media mogul who made his fortune with Newsweb Corp., has given $11.8 million to super PACs. He is a longtime funder of outside groups backing Democrats, having contributed $2 million to so-called 527 groups in the effort to defeat President George W. Bush in 2004. Eychaner is also a noted LGBT activist and has funded efforts to promote equality. Eychaner gave $3.8 to Majority PAC, $3.75 to House Majority PAC, $3.5 million to Priorities USA Action (supporting Obama), $500,000 to Women Vote!, $200,000 to America Votes Action Fund and $50,000 to L PAC.

  • United Auto Workers (D)

    The United Auto Workers union has contributed $10,707,000 million to super PACs in 2012. The union has donated $8,309,000 to the UAW Education Fund, $1.1 million to Priorities USA Action (supporting Barack Obama), $800,000 to Majority PAC, $250,000 to House Majority PAC, $208,000 to Working for Us PAC, $83,000 to Working For Us PAC, $25,000 to Defend Our Homes and $15,000 to America Votes Action Fund. (Pictured: Bob King, president of the United Auto Workers.)

  • National Education Association (D)

    The National Education Association, the largest U.S. labor union representing teachers, contributed $9,707,000 million to super PACs. The union gave $8.279 million to its own super PAC, the NEA Advocacy Fund, $500,000 to Moving Ohio Forward Action Fund, $440,000 to America Votes action Fund, $250,000 to DGA Action, $200,000 to American Bridge 21st Century $22,000 to America Votes Action Fund, $10,000 to Credo SuperPAC, $5,000 to Young Democrats of America (hybrid PAC) and $5,000 to the Patriot Majority PAC.

  • Service Employees International Union (D)

    The Service Employees International Union, the nation's fastest growing labor union representing close to 2 million people, contributed $9,435,907 to super PACs. SEIU is one of the most politically active unions in the country. SEIU has given $5,893,039 million to Florida Freedom PAC, $1 million to Priorities USA Action (supporting Obama), $653,549 to House Majority PAC, $550,000 to Service Employees International Union PEA-Federal, $425,000 to Rethink PAC (opposing Scott Brown), $297,750 to Working For Us PAC, $250,000 to Majority PAC, $200,000 to American Bridge 21st Century, $120,000 to Sierra Club Action, $20,000 to Vote Your Values, $12,919 to Workers' Voice, $8,650 to Connecticut's Future PAC and $5,000 to Gay and Lesbian Victory Fund.

  • Republican Governors Association (R)

    The Republican Governors Association, a 527 political committee currently headed by Virginia Gov. Bob McDonnell, gave $8,305,000 to the super PAC RGA Right Direction. William Koch, the lesser-known Koch brother, and two of his companies, petroleum, energy and minerals companies Oxbow Carbon and Huron Carbon, gave $4 million to Restore Our Future (backing Romney) and $500,000 to America 360 Committee.

  • James Simons (D)

    James Simons, the billionaire chairman of the hedge fund Renaissance Technologies, gave $7.5 million to super PACs. Simons is ranked 30 on the <em>Forbes</em> list of richest Americans, with a net worth of $10.5 billion. Simons gave $3.5 million to Priorities USA Action (supporting Barack Obama), $3 million to Majority PAC, a super PAC that backs Democratic Senate candidates, and $1 million to House Majority PAC, backing Democratic House candidates.

  • AFL-CIO (D)

    The AFL-CIO, the nation's largest federation of unions, contributed $6,123,437 to super PACs. The federation, boasting 12.2 million members, is made up of 57 national and international labor unions. Its funds come from the dues paid by members. The AFL-CIO gave $5.95 million to its own super PAC, and that super PAC gave $100,000 to American Bridge 21st Century.

  • Specialty Group (R)

    This unknown, unlisted Knoxville, Tennessee company, Specialty Group Inc., made a massive $5.275 million contribution to FreedomWorks for America in early October. (Pictured: FreedomWorks for America, the group supporting by Specialty Group Inc's contribution.)

  • Robert Rowling And TRT Holdings (R)

    Robert Rowling, the Texas billionaire who runs the business holding company TRT Holdings, has contributed $5.135 million to super PACs in the 2012 election cycle. Rowling ranks 66 on <em>Forbes'</em> list of richest Americans, with a net worth of $4.7 billion. He gave $5 million to American Crossroads, $100,000 to Restore Our Future (supporting Romney) and $35,000 to Texas Conservatives Fund (supporting David Dewhurst).

  • American Federation Of State, County And Municipal Employees (D)

    The American Federation of State, County and Municipal Employees, the nation's largest public employee union with 1.6 million members, contributed $4,174,085 million to super PACs. AFSCME is very politically active in local and national politics. In 2011, it faced direct attacks in such states as Ohio and Wisconsin, when Republican governors sought to curtail collective bargaining rights for public employees. AFSCME gave $1 million to Majority PAC, $575,000 to American Bridge 21st Century, $986,788 to Workers' Voice, $529,630 to Moving Ohio Forward, $415,000 to House Majority PAC, $260,120 to America Votes Action Fund, $250,000 to Priorities USA Action (supporting Barack Obama), $200,000 to Working Families For Hawaii (supporting Mazie Hirono), $125,000 for Iowans for Integrity in Leadership, $100,000 to Committee to Elect An Effective Valley Congressman (supporting Howard Berman), $100,000 to Fair Share Action, $50,000 to the American Worker, $50,000 to Sierra Club Action, $50,000 to Ohio Families United, $44,900 to Working For Us PAC, $42,500 to Defend Our Homes, $25,000 to Women Vote!, $8,650 to Connecticut's Future PAC and $5,000 to Young Democrats for America.

  • Peter Thiel (R)

    Peter Thiel, the hedge fund manager, venture capitalist and early Facebook investor, has contributed $4.73 million to super PACs. Thiel, a radical libertarian, ranks 293 on the <em>Forbes</em> list of richest Americans, with a net worth of $1.5 billion. The majority of Thiel's money, $2.73 million, has gone to Endorse Liberty, a super PAC supporting Ron Paul in the Republican presidential race. He has since switched his giving to Club for Growth Action, the super PAC of the ultra-conservative free market Club for Growth. Thiel has given $2 million to the Club super PAC.

  • William Koch, Oxbow Carbon And Huron Carbon (R)

    William Koch, the lesser-known Koch brother, and two of his companies, petroleum, energy and minerals companies Oxbow Carbon and Huron Carbon, gave $4 million to Restore Our Future (backing Romney) and $500,000 to America 360 Committee.

  • Joseph Craft And Alliance Management Holdings (R)

    Joseph Craft and his holding company, Alliance Management Holdings, gave $4.35 million to super PACs. Craft is ranked 331 on the <em>Forbes</em> list of richest Americans, with a net worth of $1.3 billion. Alliance Management Holdings is a privately held company run by Craft with significant shares in the managing partner of Alliance Resource Partners. Craft and his company gave $3.35 million to American Crossroads and $1 million to Restore Our Future (supporting Romney).

  • Jerry Perenchio (R)

    Jerry Perenchio, founder of the Spanish language television network Univision, contributed $4.1 million to super PACs. Perenchio ranks 171 on the <em>Forbes</em> list of richest Americans, with a net worth of $2.3 billion. Perenchio gave $2.5 million to American Crossroads, $1.5 million to Restore Our Future (supporting Mitt Romney), and $100,000 to Our Destiny (supporting Jon Huntsman).

  • American Federation Of Teachers (D)

    The American Federation of Teachers, the second-largest union in the nation with 1.5 million members, gave $3,866,558 to super PACs. The union donated $1,116,558 to the AFL-CIO Workers' Voices PAC, $1 million to Majority PAC, $1 million to Priorities USA Action (supporting Barack Obama), $500,000 to House Majority PAC and $250,000 to DGA Action.

  • Robert And Rebekah Mercer (R)

    Robert Mercer (left), the co-CEO of the $15 billion hedge fund Renaissance Technologies, and his daughter, Rebekah Mercer, gave $3,804,354 million to super PACs. Robert Mercer contributed $1 million to Restore Our Future (supporting Romney), $1 million to American Crossroads, $600,000 to Club for Growth Action, $250,000 to Freedom PAC, $250,000 to Prosperity First, $239,354 to Republican Super PAC and $200,000 to National Horizon. Rebekah Mercer gave $50,000 to the Coalition for American Values and $15,000 to the Club for Growth.

  • Steve & Amber Mostyn (D)

    Steve and Amber Mostyn have contributed $3.428 million to super PACs in the 2012 election cycle. Steve, a multi-millionaire trial lawyer in Houston, Texas, and the president of the Texas Trial Lawyer Association, is a long-time donor to Democratic Party causes in both Texas and nationally. The Mostyns gave $2,003,850 to Priorities USA Action (supporting Obama), $1 million to House Majority PAC, $225,000 to Texans for America's Future and $200,000 to Planned Parenthood Votes.

  • Working for Working Americans (D)

    Working for Working Americans, a union-run super PAC, has contributed $3.375 million to other super PACs in the 2012 election cycle. The super PAC has given $2 million to House Majority PAC, $1.15 million to Majority PAC and $250,000 to Lunch Pail Republicans. (Pictured: Nancy Pelosi, leader of the House Democrats, whose efforts Working for Working Americans' contributions are aiding.)

  • John Childs (R)

    John Childs, the head of the Boston-based private equity firm J.W. Childs & Associates, has contributed $3.375 million to super PACs. Childs has contributed $1.125 million to Club for Growth Action, $1 million to Restore Our Future (supporting Mitt Romney), $1 million to American Crossroads and $250,000 to Congressional Leadership Fund.

  • Amy Goldman (D)

    Amy Goldman, the author and activist who has been called "perhaps the world's premier vegetable gardener," contributed $3.25 million to super PACs. Goldman is the heiress to the fortune of New York real estate titan Sol Goldman. Goldman gave $1.5 million to Planned Parenthood Votes, the super PAC of the women's health provider, $1 million to Priorities USA Action (supporting Barack Obama), $500,000 to House Majority PAC and $250,000 to American Bridge 21st Century.

  • United Association (D)

    The United Association of Journeymen and Apprentices of the Plumbing, Pipe Fitting and Sprinkler Fitting Industry, commonly known as United Association, has contributed $3,404,500 to super PACs in the 2012 election. United Association gave $2,191,500 to Priorities USA Action (supporting Barack Obama), $500,000 to Workers' Voice, $325,000 to Majority PAC, $313,000 to House Majority PAC and $75,000 to The American Worker.

  • Crow Holdings LLC, Harlan Crow and Trammell Crow (R)

    Crow Holdings LLC, which manages the wealth of the late real estate developer Trammel Crow, its director Harlan Crow and his brother Trammel S. Crow have contributed $3.16 million to super PACs. Harlan Crow, Trammel S. Crow and the company combined to give $1.5 million to American Crossroads, $1.3 million to Restore Our Future (supporting Romney), $250,000 to FreedomWorks for America, $50,000 to Texas Conservatives Fund (supporting David Dewhurst), $35,000 to Campaign for Primary Accountability, $25,000 to American Unity PAC and $10,000 to Jan PAC.

  • Jeffrey Katzenberg (D)

    Jeffrey Katzenberg, the CEO of DreamWorks Animation, has given gave $3.15 million to super PACs. Katzenberg's net worth is estimated to be above $800 million. Katzenberg has given $3 million to Priorities USA Action, the super PAC supporting Barack Obama's reelection bid. He has also given $100,000 to Majority PAC, $25,000 to House Majority PAC and $25,000 to Committee to Elect An Effective Valley Congressman, the super PAC supporting Rep. Howard Berman (D-Calif.), a staunch ally of Hollywood. Katzenberg is also a major fundraiser for the Obama reelection campaign, having brought in more than $500,000.

  • Communications Workers Of America (D)

    The Communications Workers of America, the largest telecommunications union in the world with a membership above 700,000, contributed $2,997,741 to super PACs in the 2012 election cycle. The union donated $2,280,578 to the Communications Workers of America super PAC, $440,000 to Independent Source, $150,000 to House Majority PAC, $57,000 to Progressive Kick Independent Expenditures, $45,000 to American Worker and $28,163 to Workers' Voice.

  • John Ramsey (R)

    John Ramsey, a 21-year old college student who inherited millions from his banker grandfather, contributed $2.84 million to super PACs. The majority of the young libertarian's contributions went to his own super PAC, Liberty for All. Another $450 went to Revolution PAC, which supported Ron Paul for the Republican nomination for president.

  • Cooperative Of American Physicians (I)

    The <a href="http://www.capphysicians.com/about_us" target="_hplink">Cooperative of American Physicians</a> is a medical malpractice and medical liability insurer. The group has contributed $2.79 million to its own super PAC. No other information has been provided on the source of the funds contributed by the cooperative.

  • Dealer Computer Services, CRC Information Systems, Fairbanks Properties, & Waterbury Properties (Bob Brockman) (R)

    Four companies -- Dealer Computer Services, CRC Information Systems, Fairbanks Properties and Waterbury Properties -- sharing the same address as The Reynolds & Reynolds Company headed by Bob Brockman, have given $2.75 million to super PACs. CRC Information Systems, Fairbanks Properties and Waterbury Properties combined to give $1 million to Restore Our Future and another $1 million to American Crossroads. The Reynolds and Reynolds Company gave $500,000 to American Crossroads. Dealer Computer Services has given $200,000 to the pro-David Dewhurst Texas Conservatives Fund and $50,000 to Restoring Prosperity Fund.

  • Kenneth And Anne Griffin (R)

    Kenneth Griffin, the head of the massive hedge fund Citadel, has contributed $2.58 million to super PACs. Griffin is ranked 173rd on the <em>Forbes</em> list of richest Americans. In 2008, he helped raise money for then-Sen. Barack Obama during the Democratic primary, but switched to support Sen. John McCain (R-Ariz.) in the general election. Griffin has since become increasingly critical of President Obama and what he considers to be class warfare rhetoric coming from the White House. He stated that the wealthy have "<a href="http://www.huffingtonpost.com/2012/03/11/ken-griffin-mitt-romney_n_1337721.html" target="_hplink">insufficient influence</a>" in politics and urged the rich to donate to political efforts to preserve their position atop the food chain. Griffin has given $1.55 million to Restore Our Future (supporting Mitt Romney) and $1 million to American Crossroads. His wife, Anne, gave $30,000 to the Campaign for Primary Accountability.

  • George Soros (D)

    George Soros, the noted hedge fund investor and long-time Democratic donor, has contributed $2.525 million to super PACs when including contributions that he gave in October. Soros became famous for his political contributions after he gave more than $30 million to 527 groups to defeat former President George W. Bush in 2004. He has reached a mythological status with some conservatives as a wildly influential figure in world politics. In reported contributions, Soros has given $1 million to American Bridge 21st Century, $1 million to Priorities USA Action (supporting Barack Obama), $425,000 to House Majority PAC and $100,000 to Majority PAC.

  • Foster Friess (R)

    Foster Friess, the Wyoming investor, contributed $2.52 million to super PACs, mostly to those supporting the presidential candidacy of Rick Santorum. Since Santorum dropped out of the race, Friess has shifted his contributions to help Mitt Romney and congressional Republicans. Friess is estimated to be worth above $500 million. He has given $2.1 million to Red White and Blue Fund (supporting Santorum), $100,000 to Restore Our Future (supporting Mitt Romney), $100,000 to FreedomWorks, $50,000 to Leaders for Families (also supporting Santorum), $50,000 to Freedom PAC, $25,000 to Friends of the Majority, $25,000 to USA Super PAC, $10,000 to Freedom Born Fund, $10,000 to Arizonans for Jobs, $10,000 for Independence Virginia PAC,$10,000 to Club for Growth Action, $5,000 to Fund for Freedom and $872 to Jan PAC.

  • Chevron (R)

    Chevron, one of the nation's five largest companies, gave $2.5 million to Congressional Leadership Fund, a super PAC to elect Republicans to the House of Representatives.

  • Weaver Popcorn (R)

    Weaver Popcorn, the Indiana-based popcorn maker owned by Michael Weaver, has contributed $2.4 million to American Crossroads, the super PAC founded by Republican operative Karl Rove. The company is one of the largest popcorn companies in the United States and is best known for their Pop Weaver brand.

  • Paul Singer (R)

    Paul Singer (pictured far right), the hedge fund titan in charge of Elliot Associates, contributed $2.258 million to super PACs through June 2012. Singer has an estimated worth of $900 million. He has given $1,158,211 million to American Unity, a super PAC meant to support pro-gay marriage Republican candidates for office, $1 million to Restore Our Future (supporting Romney) and $100,000 to Club for Growth Action.

  • William Dore (R)

    William Dore, the Louisiana energy executive, gave $2.25 million to Red White and Blue Fund (supporting Santorum). This was the biggest foray into political giving by Dore, who has previously cut large checks for Louisiana Gov. Bobby Jindal and the Republican Governors Association. He is estimated to be worth in the hundreds of millions of dollars. Credit: <a href="http://www.youtube.com/watch?v=M_KzFkneorU" target="_hplink">YouTube</a>

  • Jon Stryker (D)

    Jon Stryker, an architect and heir to the Stryker Corporation fortune, has contributed $2.25 million to super PACs. Stryker has given $2 million to Priorities USA Action, the super PAC supporting Barack Obama, and $250,000 to House Majority PAC. Stryker is worth $1.1 billion and ranks 375th on the Fortune 400 richest Americans list. He is a noted GLBT activist having donated money to groups including the Gay & Lesbian Victory Fund. Stryker is also the founder of the Arcus Foundation, the largest grant maker for gay and lesbian activism in the nation. Stryker has spent big in the past to help elect Democrats and oust Republicans from office in his home state of Michigan. (Pictured: President Barack Obama, the candidate supported by Stryker's contribution.)

  • Julian Robertson (R)

    Julian Robertson, the hedge fund titan and founder of Tiger Management, contributed $2.25 million to Restore Our Future (supporting Romney) in the current election cycle. Robertson is ranked 166 on the <em>Forbes</em> list of richest Americans, with a net worth of $2.4 billion.

  • FreedomWorks (R)

    FreedomWorks, the conservative nonprofit organization, contributed $2,236,514 to its super PAC, FreedomWorks for America. The group is run by former Rep. Dick Armey and was instrumental in organizing the original Tea Party protests in 2009. The super PAC has been active in Republican Senate primaries backing Richard Mourdock's successful campaign to beat Sen. Dick Lugar in Indiana. The group also also thrown its weight behind Ted Cruz in Texas and Don Stenberg in Nebraska. Stenberg lost his primary to state Sen. Deb Fischer and Cruz faces a run-off election against Texas Lt. Gov. David Dewhurst. The group is also spending money to defeat Sen. Orrin Hatch in Utah. FreedomWorks has been spending money to help elect Tea Party Senate candidates like Cruz and Mourdock in the general election.

  • National Association Of Letter Carriers (D)

    The National Association of Letter Carriers' political action committee, the Committee on Letter Carriers Political Education Fund, gave $2,225,919 to super PACs during the 2012 election cycle. The union gave $1,213,919 to the AFL-CIO super PAC, Workers' Voice, $512,000 to House Majority PAC and $500,000 to Majority PAC.

  • Jon Huntsman Sr. (R)

    Jon Huntsman Sr., the billionaire Utah industrialist, contributed $2.22 million to a super PAC supporting the presidential candidacy of his son, Jon Huntsman Jr. Huntsman Sr. has given away much of his fortune in recent years and is estimated to be worth slightly north of $1 billion. Huntsman's contributions to Our Destiny, the super PAC backing his son in the Republican primary contest, came under scrutiny based on the laws banning coordination between super PACs and campaigns.

  • Irwin Jacobs (D)

    Irwin Jacobs, a founder of Qualcomm, has contributed $2.2 million to super PACs. Jacobs is worth $1.15 billion and ranks 372nd on the Forbes list of the 400 richest Americans. Jacobs has given $2 million to Priorities USA Action (supporting Barack Obama) $100,000 to Majority PAC and $100,000 to American Bridge 21st Century.

  • National Association of Realtors (I)

    The National Association of Realtors, the primary trade association for realtors, has contributed $2,110,485 to its own super PAC in the 2012 election cycle. The group has long been a player in congressional elections and has already spent significant amounts to help Rep. Gary Miller (R-Calif.) hold his newly redistricted seat in the 2012 elections.

  • National Air Traffic Controllers Association (D)

    The National Air Traffic Controllers Association has given $2,106,597 to super PACs during the 2012 election cycle. The union represents 20,000 controllers, engineers and other professionals involved in air traffic control. The union gave $1.25 million to Priorities USA Action (supporting Barack Obama), $600,000 to Majority PAC, $156,597 to the AFL-CIO Workers' Voice and $100,000 to House Majority PAC.

  • Warren Stephens, Stephens Investment Holding & Stephens Inc. (R)

    Warren Stephens, the head of Stephens, Inc., has contributed $2.05 million to super PACs. Stephens is tied for the position of 130th richest American, according to Forbes. Stephens has given $1.5 million to American Crossroads, $500,000 to Restore Our Future (supporting Romney) and $50,000 to Congressional Leadership Fund. (Pictured: Stephens, right, with President George W. Bush.)

  • Laborers' International Union (D)

    The Laborers' International Union, which represents a half-million construction workers, has given $2.025 million to super PACs. The union gave $1.3 million to House Majority PAC, $650,000 to Majority PAC, $70,000 to Workers' Voice and $5,000 to The American Worker.

  • Richard Roberts (R)

    Richard Roberts, an adviser at Mutual Pharmacy, has given $2.1 million to super PACs in the 2012 election cycle. Roberts gave $1 million to Treasure Coast Jobs Coalition, $750,000 to Restore Our Future, the super PAC supporting Mitt Romney, $250,000 to American Crossroads and $10,000 to Patriot Prosperity PAC. (Pictured: Mitt Romney, the candidate supported by Roberts' contribution.)

  • The Morses, The Villages & Other Companies (R)

    H. Gary Morse, his wife, their children, the retirement community they operate, The Villages, and a number of subsidiary companies have combined to contribute $2,003,400 to super PACs in the 2012 election cycle. The Morses and their companies contributed $1,753,400 to Restore Our Future (supporting Mitt Romney), $200,000 to American Crossroads and $50,000 to Freedom PAC (supporting Connie Mack). H. Gary Morse is part of Romney's Florida finance team and has hosted fundraisers for the former Massachusetts governor. The family's super PAC giving has all gone to support Romney's bid. Through September, a series of subsidiary companies controlled by The Villages and H. Gary Morse contributed $1.25 million to Restore Our Future and American Crossroads.

  • Anne Cox Chambers (D)

    Anne Cox Chambers, the owner of the media company Cox Enterprises, has contributed $2 million to Priorities USA Action, the super PAC backing President Barack Obama. Chambers is also the daughter of failed 1920 Democratic presidential nominee James Cox. Chambers is the 26th richest American, according to the Forbes 400 list, with a net worth of $12 billion.

CORRECTION: An earlier version of this article incorrectly referred to Gov. Scott Walker as governor of Minnesota. He is of course the governor of Wisconsin.

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