The Koch brothers are postponing their semi-annual meeting with donors, Republican politicians and conservative activists, National Review reports.

The meeting, originally scheduled to take place in January, will now be held in April. Charles Koch announced the postponement in an email obtained by National Review, where he also addressed the "disappointing" results of the 2012 election.

"Despite November’s disappointing election results, I am convinced that America’s long-term decline is far from a foregone conclusion," Koch wrote. "Our goal of advancing a free and prosperous America is even more difficult than we envisioned, but it is essential that we continue, rather than abandon, this struggle."

Koch said the meeting was delayed while key data on the state elections -- needed to "re-examine our vision and the strategies and capabilities required for success" -- is being collected.

At a January 2012 semi-annual meeting, the Kochs led a pledge to put approximately $100 million toward defeating President Obama in the 2012 elections. HuffPost's Amanda Terkel and Ryan Grim reported earlier:

At a private three-day retreat in California last weekend, conservative billionaires Charles and David Koch and about 250 to 300 other individuals pledged approximately $100 million to defeat President Obama in the 2012 elections.

A source who was in the room when the pledges were made told The Huffington Post that, specifically, Charles Koch pledged $40 million and David pledged $20 million.

The semi-annual, invitation-only meeting attracts wealthy donors, Republican politicians and conservative activists. Last year, hundreds of activists gathered outside the walled-off resort to protest the meeting. This year, however, the conference went off quietly.

"Conference organizers and their guests successfully slipped in and out of the Coachella Valley without being detected, by buying out nearly all of the 500-plus rooms at the Renaissance Esmeralda resort in Indian Wells," reported The Desert Sun. "The resort closed its restaurants, locked down the grounds with private security guards and sent many workers home."

This is the ninth straight year the Kochs have hosted the conference. As Politico reported last year, the meetings often adjourn "after soliciting pledges of support from the donors -- sometimes totaling as much as $50 million -- to nonprofit groups favored by the Kochs."

Despite the major money push from the Kochs and their group Americans for Prosperity -- which put almost $40 million toward the 2012 election, according to Open Secrets -- Republicans suffered, prompting Republican National Committee Chairman Reince Priebus to promise a "full autopsy" of the GOP strategy.

Another major conservative donor, Sheldon Adelson, seemed less fazed by the GOP's struggles. After spending nearly $150 million on Republicans in the 2012 election, he vowed to "double" his donations in the next round of election showdowns.

"I happen to be in a unique business where winning and losing is the basis of the entire business," Adelson told the Journal. "So I don't cry when I lose. There's always a new hand coming up."

Also on HuffPost:

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  • 2012 -- Mitt Romney

    Republican presidential candidate, Mitt Romney, speaks at the podium as he concedes the presidency on November 7, 2012 in Boston, Massachusetts. (Photo by Matthew Cavanaugh/Getty Images)

  • 2008 -- John McCain

    Sen. John McCain, R-Ariz., gestures to his supporters, while his wife, Cindy looks on during his concession speech at the Arizona Biltmore in Phoenix, Tuesday, Nov. 4, 2008. (AP Photo/Elise Amendola)

  • 2004 -- John Kerry

    Former Democratic presidential candidate U.S. Senator John Kerry (D-MA) stands on stage with his wife Teresa Heinz Kerry after delivering his concession speech at Faneuil Hall on November 3, 2004 in Boston, Massachusetts. (Photo by Chris Hondros/Getty Images)

  • 2000 -- Al Gore

    Democratic presidental candidate Al Gore leaves the voting booth after casting his vote at Forks River Elementry School in Elmwood, Tennessee on November 7, 2000. (TIMOTHY A. CLARY/AFP/Getty Images)

  • 1996 -- Bob Dole

    Republican presidential candidate Bob Dole lowers his head while making his concession speech to supporters at a Washington hotel, on Tuesday, Nov. 5, 1996. (AP Photo/J. Scott Applewhite)

  • 1992 -- George H.W. Bush

    U.S. President George Bush concedes the election on Nov. 3, 1992 after losing to President-elect Bill Clinton. (BOB DAEMMRICH/AFP/Getty Images)

  • 1992 -- Ross Perot

    U.S. independent presidential candidate Ross Perot delivers his concession speech on November 3, 1992 after Democrat Bill Clinton won the presidential election. (Photo credit should read PAUL RICHARDS/AFP/Getty Images)

  • 1988 -- Michael Dukakis

    Democratic presidential candidate Michael Dukakis wipes his upper lip during the first presidential debate with his opponent U.S. Vice President George Bush in Winston-Salem, N.C. on Sept. 25, 1988. (AP Photo/Bob Jordan)

  • 1984 -- Walter Mondale

    Defeated presidential hopeful Walter Mondale addresses supporters at night, Tuesday, Nov. 7, 1984 at the St. Paul Civic center, conceding to President Reagan. (AP Photo/Jim Mone)

  • 1980 -- Jimmy Carter

    U.S. President Jimmy Carter concedes defeat in the presidential election as he addresses a group of Carter-Mondale supporters in Washington, D.C., on Tuesday, Nov. 4, 1980. (AP Photo/Barry Thumma)

  • 1976 -- Gerald Ford

    President Gerald Ford speaks in the White House Press Room in Washington on November 3, 1976, conceding defeat to Jimmy Carter. (AP photo/ stf)

  • 1972 -- George McGovern

    Sen. George McGovern and his family in Sioux Falls, election night, Nov. 7, 1972 after he was defeated by Richard Nixon, and conceding the election. (AP Photo)

  • 1968 -- Hubert H. Humphrey

    Vice President Hubert H. Humphrey spaks at the Alfred E. Smith memorial dinner in Waldorf Astoria on Oct. 16, 1968 in New York. (AP Photo/John Lent)

  • 1964 -- Barry Goldwater

    A contact sheet of Republican senator Barry Morris Goldwater of Arizona concedes the 1964 presidential election to President Lyndon Johnson at a press conference held at his campaign headquarters at the Camelback Inn, Phoenix, Arizona, on November 4, 1964. (Photo by Washington Bureau/Getty Images)

  • 1960 -- Richard Nixon

    Vice President Nixon points to home-made sign at airport as he arrives in home state to cast his ballot on Nov. 8, 1960 in Ontario, California. (AP Photo)

  • 1956 -- Adlai Stevenson

    Sen. John F. Kennedy of Massachusetts talks with Democratic presidential candidate Adlai Stevenson on August 12, 1956 in Chicago. (AP Photo)

  • 1952 -- Adlai Stevenson

    Movie Actress Piper Laurie (left) is wearing a donkey head beauty spot on her cheek as she chats with Gov. Adlai Stevenson of Illinois, Democratic presidential nominee in Portland on Sept. 8, 1952. (AP Photo)

  • 1948 -- Thomas Dewey

    Dewey ran as the presidential candidate of the Republican Party in the elections of 1944 and 1948. (Photo by Fox Photos/Getty Images)

  • 1944, 1948 -- Thomas Dewey

    Thomas Dewey (1902 - 1971) Governor of the State of New York broadcasting over the 'Crusade of Freedom' radio. Dewey was the presidential candidate of the Republican Party in the elections of 1944 and 1948. (Photo by Keystone/Getty Images)

  • 1940 -- Wendell Wilkie

    Wendell Willkie, rehearses a report to the nation at a New York City radio station on Oct. 26, 1942. Willkie was President Roosevelt's personal representative, and his Republican opponent in the 1940 presidential elections. (AP Photo/Murray Becker)

  • 1936 -- Alf Landon

    Gov. Alf M. Landon, G.O.P. presidential nominee, voting in Independence, Kansas on Nov. 3, 1936. (AP Photo)

  • 1932 -- Herbert Hoover

    Herbert Hoover is shown leaving Madison Square Garden, Oct. 31, 1932 in New York City, after delivering his major campaign address before a crowd estimated at 22,000. (AP Photo)

  • 1928 -- Alfred E. Smith

    Governor Alfred E. Smith speaks in New York on Nov. 2, 1928. (AP Photo)

  • 1924 -- John W. Davis

    John W. Davis, Democratic nominee for President of the U.S., and his wife, are pictured on the estate of Charles Dana Gibson at Seven Hundred Acre Island in Dark Harbor, Maine on July 21, 1924. (AP Photo)

  • 1920 -- James M. Cox

    Democratic candidates for the presidency and vice-presidency of the United States, Governor James M Cox and Franklin Delano Roosevelt (1882 - 1945) are seen at the head of a nomination parade in Dayton, Ohio on Nov. 1, 1920. (Photo by Topical Press Agency/Getty Images)

  • 1916 -- Charles Evans Hughes

  • 1912 -- Theodore Roosevelt

    Theodore Roosevelt during the progressive campaign of 1912. (AP Photo)