WASHINGTON — For Rep. Lois Capps of California and other vulnerable House Democrats, a string of successful re-election bids and double-digit margins of victory may mean little this year.

Her Santa Barbara-area district has been redrawn in the wake of the latest census, turning it from Democratic-leaning to one evenly divided between Republicans and Democrats. Capps has responded by spending more time than ever raising money, hiring campaign staff and meeting voters.

"It's totally intensive, labor-intensive," she says.

And unheard of for a six-term congresswoman who routinely defeats her Republican opponents by 20 to 36 percentage points. At least seven other veteran House Democrats – in California, Iowa, Utah, Massachusetts, New York, Georgia and North Carolina – have become top GOP targets because of new district boundaries.

The prospect of making Democratic veterans fight for their seats, if not lose them, offers House Republicans a chance to show some political muscle after a wrenching two-year term in which the factions of the GOP struggled to govern in the wake of recession. With the electorate still down on Congress and deeply concerned about the economy and joblessness, Republicans seeking to fortify their 51-seat House majority are rushing to frame the 2012 election as a referendum on President Barack Obama's stewardship, as well as that of his Democratic allies.

"Voters across the country have reached a breaking point. They know we can't fix the problems in Washington unless we remove the career politicians who have been part of the problem for decades," said Andrea Bozek, a spokeswoman for the National Republican Campaign Committee.

The NRCC, the House Republicans' campaign arm, has already reserved ad time targeting some longtime House Democrats:

_$2.2 million for ads that could hit Rep. John Tierney, D-Mass., first elected in 1996.

_$948,000 for ad time against Rep. Jim Matheson, D-Utah, elected in 2000.

_$700,000 for Rep. Mike McIntyre, D-N.C., first elected in 1996.

_Thousands of dollars for ads targeting Capps and Rep. John Barrow, D-Ga., first elected in 2004.

Democrats, who need to pick up 25 House seats to regain the majority, say 2012 will not be a reprise of 2010. Two years ago, 17 Democrats who had served at least four terms lost their seats and 11 more retired and did not seek other public office.

Vulnerable incumbents have anticipated redistricting, Democrats say, and they've been educated by the experiences of former colleagues who didn't appreciate the political threats that faced them until it was too late.

Some of the ousted veterans, like former Rep. Gene Taylor, D-Miss., first elected in 1988, were outraised by their opponents. Others, like former Reps. Jim Oberstar, D-Minn., and Solomon Ortiz, D-Texas, elected in 1974 and 1982, respectively, seemed to realize too late that they were in a race. Both Oberstar and Ortiz comfortably outraised their opponents but left thousands of dollars unspent in their campaign accounts.

Redistricting presents incumbents a stark choice: Retire and avoid a grueling campaign, or buckle down and fight.

Fourteen veteran Democrats who served at least four terms opted to retire after this year with no immediate plans to run for another office, compared with 10 veteran Republicans. One of the Democrats was Rep. Brad Miller, D-N.C., who chose to forgo a race for a sixth House term rather than run in a contentious primary when he was lumped into a district with a fellow Democratic veteran, 12-term Rep. David Price.

"There would be no joy in this campaign," Miller said in announcing his decision.

Among those seeking to stay in Washington, there's been a clear push to stay ahead of the game.

Tierney has raised $900,000 – almost $200,000 more than he took in for the 2008 election – as he runs for re-election this year. Rep. Louise Slaughter, D-N.Y., has raised almost $800,000 for her first vigorous race in 16 years.

Some of the longtime members most affected by redistricting in 2012 are regular targets. In Utah, Matheson was already girding for a tough race when the GOP-controlled Utah Legislature carved up his new district, giving him territory he's never represented before. That enticed a top flight challenger, Saratoga Springs Mayor Mia Love, to get into the race. The same is true for Barrow, already under pressure as the last white Southern Democrat in the House, who has seen more Republicans added to his district this year. Both Matheson and Barrow have raised more than $1 million to fight for their seats.

In Iowa, longtime Rep. Leonard Boswell, first elected in 1996, was drawn into a district that includes more Republicans and faces a top-flight challenge from another incumbent congressman, Republican Rep. Tom Latham. Boswell has raised nearly $1 million for the race.

Rep. Jim Costa, one of Capps' California colleagues, has prepared for a potentially tougher race by raising more than $800,000.

Capps has not faced such opposition since her first election to a full House term in 2000. She said she's kept her operation well-tuned over the years even with minimal challenges to her seat.

"It's what you have to do to run a good campaign," she said.

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Republicans are also being targeted in competitive races:
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  • Rep. Sean Duffy (R-Wis.)

    Duffy, a former contestant on MTV's "Real World" who entered Congress last year, drew criticism when he told constituents that he struggles on his $174,000 a year salary. "I drive a used minivan," <a href="http://thinkprogress.org/politics/2011/03/29/154368/rep-sean-duffy-complains-about-his-salary/" target="_hplink">he said</a> during a town hall meeting last March. "If you think I'm living high off the hog, I've got one paycheck. So I struggle to meet my bills right now."

  • Rep. Steve King (R-Iowa)

    After the Department of Health and Human Services announced new guideliens that would require health insurers to do away with co-pays for birth control, King took to the House floor in August to express his concerns with the policy. "Preventing babies from being born is not medicine," <a href="http://www.huffingtonpost.com/2011/08/02/steve-king-free-birth-control_n_916519.html" target="_hplink">he said.</a> "That's not constructive to our culture and our civilization. If we let our birth rate get down below replacement rate we're a dying civilization." King's comments weren't his first to raise eyebrows. The Iowa congressman has also described same-sex marriage as a <a href="http://www.huffingtonpost.com/2009/09/24/steve-king-gay-marriage-i_n_298372.html" target="_hplink">"purely socialist concept,"</a> and <a href="http://www.huffingtonpost.com/2010/06/23/steve-king-the-year-in-cr_n_622666.html?ref=steve-king#s104351&title=King_Accuses_Obama" target="_hplink">called </a>President Barack Obama a racist, claiming that he "favors the black person." King was also the <a href="http://www.huffingtonpost.com/2009/07/08/rep-steve-king-lone-vote_n_227866.html" target="_hplink">only congressman</a> to not acknowledge the role slaves played in constructing the U.S. Capitol.

  • Rep. Allen West (R-Fla.)

    West has quickly become one of the most outspoken freshmen in Congress, making a number of offensive comments about his colleagues. In his first year of office, West <a href="http://www.huffingtonpost.com/2011/07/19/allen-west-debbie-wasserman-schultz_n_904047.html" target="_hplink">incited</a> a feud with fellow Floridian and DNC Chair Rep. Debbie Wasserman Schultz, <a href="http://www.huffingtonpost.com/2011/08/18/allen-west-harriet-tubman_n_930052.html" target="_hplink">called</a> Rep. Maxine Waters (D-Calif.) a "plantation overseer," and <a href="http://www.huffingtonpost.com/2011/12/16/allen-west-goebbels-democrats-nazi-propaganda_n_1154476.html" target="_hplink">compared</a> Democrats to Nazi propagandist Joseph Goebbels. West began 2012 on a similar foot. During a dinner with the Palm Beach County GOP, <a href="http://www.huffingtonpost.com/2012/01/28/allen-west-liberals-get-out-florida-primary-2012_n_1239247.html" target="_hplink">he said</a> that liberals like President Obama, Sen. Harry Reid (D-Nev.) and House Minority Leader Nancy Pelosi (D-Calif.) should "get the hell out of the United States of America."

  • Rep. Joe Walsh (R-Ill.)

    Last fall, <a href="http://www.huffingtonpost.com/2011/11/08/joe-walsh-screams-at-cons_n_1083014.html?1321280921" target="_hplink">a video</a> of Walsh screaming at some of his constituents went viral. After one attendee at a "Cup of Joe with Joe Walsh" event in Gurnee, Illinois asked Walsh about the role of bank regulation in the financial collapse, Walsh launched into a rant. "Don't blame the banks ... that pisses me off," he said. "It's not the private marketplace that created this mess. What created [this] mess was your government." Walsh has also caught heat for his <a href="http://www.suntimes.com/news/metro/7656284-418/judge-scolds-rep-joe-walsh-orders-him-to-prove-he-doesnt-owe-back-child-support.html" target="_hplink">refusal to pay child support</a> to his former wife. Walsh's ex-wife, Laura, has said that the congressman now owes over $100,000.

  • Rep. Frank Guinta (R-N.H.)

    Guinta, formerly the mayor of Manchester, was included on the Citizens for Responsibility and Ethics in Washington's <a href="http://www.crewsmostcorrupt.org/mostcorrupt/entry/Frank-Guinta-report" target="_hplink">list</a> of most corrupt members of Congress, citing an <a href="http://www.huffingtonpost.com/2010/08/13/gop-candidate-frank-guint_n_681246.html" target="_hplink">unreported personal bank account</a> with hundreds of thousands of dollars in assets and loans he made to his own campaign.

  • Rep. Chip Cravaack (R-Minn.)

    Cravaack came under fire last summer for hosting <a href="http://www.politico.com/news/stories/0811/61454.html" target="_hplink">private events</a> in Duluth, Minnesota -- his district's most populous city -- including a $10-per-head meeting, but no public town halls. The congressman had previously campaigned on the <a href="http://www.startribune.com/templates/Print_This_Story?sid=106630083" target="_hplink">platform</a> that members of Congress should be more in touch with their constituents. Cravaack eventually folded under pressure from protesters and <a href="http://www.huffingtonpost.com/2011/08/23/chip-cravaack-town-hall-meeting_n_934411.html" target="_hplink">scheduled</a> a public town hall. The congressman was also criticized for moving his family to <a href="http://www.politico.com/blogs/davidcatanese/0711/Cravaack_family_moves_to_New_Hampshire_.html" target="_hplink">New Hampshire</a>, although he had made his opponent former Rep. Jim Oberstar's residency in his district an issue in his 2010 congressional campaign.

  • Rep. Mike Fitzpatrick (R-Penn.)

    Fitzpatrick has drawn the ire of many left-leaning activists for his steadfast alignment with the Tea Party-centered policies pushed with the help of freshman representatives ushered in by 2010's wave elections. His tenure in Congress also began with controversy, when it was <a href="http://www.huffingtonpost.com/2011/01/06/two-house-republicans-vot_n_805423.html" target="_hplink">reported</a> that he'd missed his own swearing in ceremony because he was at a fundraiser.

  • Rep. Dan Lungren (R-Calif.)

    Lungren has established himself as a key target of Democrats because of his staunch anti-abortion views. His votes against women's choice and health have led CREDO to label him "California's Rick Santorum."