The Iowa caucuses

Supporter Austin Goolsbee cheers the Iowa victory for Barack Obama by making an “O” with his arms at Hy-Vee Hall in Des Moines.  (Rick Loomis / Los Angeles Times)

Republican presidential candidate and former Arkansas Gov. Mike Huckabee speaks to supporters in Des Moines. He defeated former Massachusetts Gov. Mitt Romney to win the Iowa GOP caucus. Behind him is his wife, Janet.  (Jay L. Clendenin / Los Angeles Times)

Mike Huckabee, the Republican winner of the Iowa caucuses, and wife Janet take the stage for his acceptance speech in Des Moines.  (Jay L. Clendenin / Los Angeles Times)

Hillary Rodham Clinton addresses her supporters and congratulates rival Barack Obama on his victory in the Democratic caucus. The senator from New York shares the stage with her husband, former President Bill Clinton, and daughter Chelsea at the Hotel Fort Des Moines.  (Barbara Davidson / Los Angeles Times)

A lone security guard is all that’s left at the Hotel Fort Des Moines, where Hillary Rodham Clinton gave her concession speech before heading off to New Hampshire for Tuesday’s primary.  (Barbara Davidson / Los Angeles Times)

Mitt Romney with his wife, Ann, walks out to the podium to congratulate Mike Huckabee for winning the Iowa Republican caucus.  (Gina Ferazzi / Los Angeles Times)

Ann Romney hugs Olympic speed skater Dan Jansen as Mitt Romney came onstage to concede the Iowa Republican caucus to Mike Huckabee.  (Gina Ferazzi / Los Angeles Times)

Democratic presidential hopeful John Edwards in Des Moines, where he described his second-place finish as a victory.  (Chris Hondros / Getty Images)

Sen. Joseph Biden of Delaware hugs a supporter before a caucus at Jackson Elementary School. Biden later abandoned his bid for the Democratic presidential nomination amid a poor showing in Iowa’s precinct caucuses.  (David Lienemann / Associated Press)

Mike Huckabee shakes hands with attendees after a speech at the Veterans Memorial building in Grinnell.  (Jay L. Clendenin / Los Angeles Times)

Former Sen. John Edwards, the North Carolina Democrat, speaks to supporters at a morning rally in Des Moines.  (Chris Hondros / Getty Images)

Voters register to caucus at Waukee High School in Waukee, a suburb west of Des Moines.  (Gina Ferazzi / Los Angeles Times)

Sen. Hillary Rodham Clinton says hello to a young caucus attendee in Des Moines.  (Barbara Davidson / Los Angeles Times)

Caucus participants cast long shadows on the snowy ground as they line up to enter Lovejoy Elementary School in Des Moines.  (Barbara Davidson / Los Angeles Times)

Republican Mitt Romney visits with voters and other residents at Valley High School before they caucus in West Des Moines.  (Gina Ferazzi / Los Angeles Times)

The press swarms around Mitt Romney after he greeted employees at Principal Financial Group in Des Moines.  (Gina Ferazzi / Los Angeles Times)

Ann Romney leaves the stage after introducing her husband, Mitt, at the corporate headquarters of convenience store chain Kum & Go in West Des Moines.  (Gina Ferazzi / Los Angeles Times)

Sen. Hillary Rodham Clinton and former President Bill Clinton laugh with waitress Dawny Valdez while ordering lunch at the Latin King restaurant in Des Moines.  (Charlie Neibergall / AP)

Republican hopeful and former Sen. Fred Thompson of Tennessee makes a campaign stop in West Des Moines.  (Jeff Chiu / Associated Press)

Rep. Ron Paul (R-Texas) checks the time before being introduced at a campaign event at Des Moines University.  (Evan Vucci / Associated Press)

Republican hopeful John McCain, the senator from Arizona, greets supporters at his campaign headquarters in Urbandale.  (Tannen Maury / EPA)