Presidential candidates who have dropped out
The long-time senator from Delaware declared his candidacy on Jan. 23, 2007. He dropped out on Jan. 3, 2008 after a dismal showing in the Iowa caucuses.
The New York senator battled Barack Obama through the entire primary cycle.
The senator from Connecticut declared his candidacy on Jan. 11, 2007. He dropped out of the race Jan. 3, 2008, after placing seventh among Democrats in the Iowa caucuses.
The former senator from North Carolina ran a populist campaign aimed at combating poverty and helping the poor, but dropped out Jan. 30 after losing the Florida primary.
The congressman from Ohio ended his second bid for the White House on Jan. 25, 2008, announcing he planned to focus on his reelection to the House of Representatives.
Richardson, the governor of New Mexico and a former ambassador to the United Nations and US Secretary of Energy, announced his candidacy in January 2007. He dropped out Jan. 10, 2008, after fourth place finishes in both Iowa and New Hampshire.
The former governor of Iowa announced his candidacy in November 2006. He dropped out Feb. 23, 2007, after failing to raise enough money to mount a national campaign. A month later he endorsed Hillary Clinton, and serves as one of her national co-chairs.
The conservative Kansas senator entered the race in December 2006. He dropped out in October 2007, citing problems raising money. He subsequently endorsed John McCain.
The former governor of Virginia jumped into the race in January 2007, but fund-raising problems forced him to quit six months later.
The former mayor of New York City originally topped Republican polls but lost steam quickly and dropped out of the race Jan. 30 to endorse John McCain.
Former senator from Alaska who ran a small-scale longshot campaign that included calling for an orderly and immediate withdrawal from Iraq.
Former Arkansas governor Mike Huckabee's candidacy brought him national exposure. He was a darling of the Republican conservative base, but failed to garner enough delegates to clinch the nomination. Huckabee ended his campaign on March 4, 2008, conceding the nomination to John McCain.
After more than 25 years in office, the California congressman and chairman of the Armed Services Committee announced a run for office on a platform of a strong national defense. After a poor result in the Nevada caucuses, Hunter announced he would exit the race on Jan. 19, 2008.
The Representative from Texas ran a grassroots, Libertarian-leaning bid.
The former governor of Massachusetts won several states, but bowed out Feb. 7 saying he did not want to act as a spoiler that gave Democratic candidates an edge.
The Colorado congressman joined the race in April 2007, and made illegal immigration the main issue of his campaign. On Dec. 20 he dropped out and endorsed Mitt Romney, declaring he didn't want to split the anti-immigration vote and allow a pro-amnesty candidate to win.
The former Tennessee senator and television actor announced he was joining the race on Sept. 5, 2007 when he made the official announcement on The Tonight Show with Jay Leno. After several poor showings in primaries and caucuses, he dropped out of the race on Jan. 22, 2008.
The former Wisconsin governor and former US Secretary of Health and Human Services entered the race on April 1, 2007. He dropped out on Aug. 12 after finishing sixth in the key Iowa Straw Poll