Republican presidential candidate, Sen. Ted Cruz, R-Texas, speaks during a caucus night rally as his wife Heidi listens Monday in Des Moines, Iowa. The Associated Press
Ted Cruz supporters cheer as caucus returns show Cruz first in the Republican field.
Josh Kent celebrates at a Ted Cruz caucus rally Monday night in Des Moines. Cruz came out on top in the Republican race.
Sen. Ted Cruz of Texas talks to supporters Monday at the Green County Community Center in Jefferson, Iowa.
Sen. Ted Cruz of Texas, facing an electorate in Iowa that's more evangelical than those in many states, speaks at a campaign event Monday at the Grace Baptist Church in Marion, Iowa.
Donald Trump speaks at his caucus night rally Monday in West Des Moines, Iowa, after finishing behind Texas Sen. Ted Cruz.
Republican candidate Donald Trump visits the caucus site in West Des Moines on Monday night.
Voters hold up signs for Republican Sen. Marco Rubio as Donald Trump visits Saint Francis of Assisi Church, a caucus site in West Des Moines.
Donald Trump and wife, Melania, visit a caucus site Monday night in Clive, Iowa. Trump was second among three candidates at the top of the Republican field, trailing Sen. Ted Cruz of Texas.
Marco Rubio acknowledges the audience at his caucus night celebration in Des Moines. Rubio was running a close third behind Ted Cruz and Donald Trump.
Republican candidate Marco Rubio has his photo taken at a caucus site Monday in Clive, Iowa.
Sen. Marco Rubio waits to speak Monday night at a caucus site in Clive, Iowa.
A supporter of Republican candidate Marco Rubio shows it at the caucus site in Clive, Iowa.
Republican candidate Ben Carson speaks to supporters at his campaign's caucus night rally in West Des Moines. Carson was running a distant fourth.
Republican candidate Rand Paul is watched by his wife, Kelley, as he speaks to supporters during Monday's caucus night rally at the Scottish Rite Consistory in Des Moines, Iowa.
Former Arkansas Gov. Mike Huckabee, speaking Sunday in West Des Moines, Iowa, said on Twitter on Monday that he’s ending his run for president.
Bernie Sanders speaks to reporters Monday from his bus outside his campaign's Iowa headquarters in Des Moines.
Democratic candidate Sen. Bernie Sanders watches caucus returns Monday night in his hotel room in Des Moines, Iowa.
Bernie Sanders, whose young supporters helped him finish even with Hillary Clinton, arrives for a caucus night rally on Monday in Des Moines, Iowa.
Democratic Sen. Bernie Sanders of Vermont and his wife, Jane, acknowledge the crowd as he arrives for his caucus night rally in Des Moines. He and Hillary Clinton finished virtually tied in the Iowa caucuses.
Former President Bill Clinton greets his wife's supporters at the campaign office in Ankeny, Iowa.
Hillary Clinton takes photos with workers at her campaign office in Des Moines, Iowa, on Monday before the start of the caucuses.
Hillary Clinton, accompanied by former President Bill Clinton and their daughter, Chelsea Clinton, arrives at her caucus night rally at Drake University in Des Moines.
Hillary Clinton told the crowd at her caucus night party, "It is rare that we have the opportunity we do now, to have a real contest of ideas" in this year's Democratic primary.
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