Security and volunteers wait for Republican presidential candidate Texas Gov. Rick Perry to arrive. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

Campaign workers set up signs and packets of flyers to give to the "Iowa Strike Force" volunteers. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

Miranda Ashley and Reagan Ashley are honored as Republican presidential candidate Texas Gov. Rick Perry. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

Republican presidential candidate Texas Gov. Rick Perry kisses wife Anita Perry. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

Republican presidential candidate Texas Gov. Rick Perry high fives Louisiana Gov. Bobby Jindal. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

Max Suires waits for his bus by Ron Paul yard sign. A Democrat, he does not plan to participate in the Republican Caucus. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

Rick Perry's security and staff watches him speak at the Principal Financial Group. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

Pins For Perry. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

Media surround Rick Perry. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

A worker carries Iowa Caucus T-Shirts for Republican presidential candidate Newt Gingrich's caucus night festivities. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

Workers set up decorations for Newt Gingrich's caucus night festivities. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

Caucus goers arrive for voting in the Republican Presidential Caucus in Clive Precinct 4. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Caucus goers arrive for voting in the Republican Presidential Caucus in Clive Precinct 4. Caucus Day. © 2012 Patrick T. Fallon/For The New York Times

Republican presidential candidate Rick Santorum makes a surprise visit to caucus goers in Clive Precinct 4. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Republican presidential candidate Rick Santorum makes a surprise visit to caucus goers in Clive Precinct 4. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Voting at the Republican Presidential Caucus in Clive Precinct 4. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Caucus tellers count the votes in the Republican Presidential Caucus at Clive Precinct 4. Romney received 238 votes, while Huntsman received just 1 vote. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Paula Maxheim of Des Moines waits for Newt Gingrich to speak. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Supporters of Republican presidential candidate Newt Gingrich in Veterans Auditorium. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Callista Gingrich walks with her husband Newt Gingrich before he speaks to supporters about his performance in Iowa. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Newt Gingrich speaks to supporters about his performance in Iowa. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Newt Gingrich speaks to supporters about his performance in Iowa. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Fox News is screen through as glass of wine as supporters of Republican presidential candidate Newt Gingrich wait for his speech. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Republican presidential candidate Rick Santorum with his family celebrating his near-victory. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

Republican presidential candidate Rick Santorum is swarmed after celebrating his near-victory. Caucus Night. © 2012 Patrick T. Fallon/For The New York Times

(Early Edition A1, Patrick Fallon, left. NY Edition A1, Daniel Acker, right.) © 2012 The New York Times