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Open Image ModalSupporters cheer as caucus returns are reported at Republican presidential candidate, Sen. Ted Cruz, R-Texas, caucus night rally, Monday, Feb. 1, 2016, in Des Moines, Iowa. (credit:ASSOCIATED PRESS)
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Open Image ModalRepublican presidential candidate, Sen. Ted Cruz, R-Texas, speaks during a caucus night rally, Monday, Feb. 1, 2016, in Des Moines, Iowa. (credit:ASSOCIATED PRESS)
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Open Image ModalRepublican presidential candidate, Sen. Ted Cruz, R-Texas, speaks during a caucus night rally, Monday, Feb. 1, 2016, in Des Moines, Iowa. (credit:ASSOCIATED PRESS)
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Open Image ModalRepublican presidential candidate Sen. Ted Cruz (R-TX) embraces his wife Heidi in front of supporters at the caucus night gathering at the Iowa State Fairgrounds on February 1, 2016 in Des Moines, Iowa. (credit:Christopher Furlong via Getty Images)
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Open Image ModalJosh Kent celebrates at Republican presidential candidate, Sen. Ted Cruz, R-Texas, caucus night rally, Monday, Feb. 1, 2016, in Des Moines, Iowa. (credit:ASSOCIATED PRESS)
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Open Image ModalRepublican presidential candidate Sen. Marco Rubio, R-Fla., and his family pray during opening of a caucus site, Monday, Feb. 1, 2016 in Clive, Iowa. (credit:ASSOCIATED PRESS)
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Open Image ModalRepublican presidential candidate Sen. Marco Rubio, R-Fla., lifts his son Anthony, 10, at a caucus night rally, Monday, Feb. 1, 2016, in Des Moines, Iowa. (credit:ASSOCIATED PRESS)
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Open Image ModalRepublican Presidential candidate Donald Trump gestures to his supporters after finishing second in the Iowa Caucus, in West Des Moines, Iowa, February 1, 2016. (credit:JIM WATSON via Getty Images)
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Open Image ModalRepublican presidential candidate, businessman Donald Trump blows a kiss after speaking at his caucus night rally, Monday, Feb. 1, 2016, in West Des Moines, Iowa. (credit:ASSOCIATED PRESS)
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Open Image ModalRepublican presidential candidate Donald Trump walks down the steps after speaking at a caucus site, Monday, Feb. 1, 2016, in Clive, Iowa. (credit:ASSOCIATED PRESS)
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Open Image ModalDemocratic presidential candidate 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, Iowa, Monday, Feb. 1, 2016. (credit:ASSOCIATED PRESS)
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Open Image ModalDemocratic presidential candidate Hillary Clinton, accompanied by former President Bill Clinton, arrives at her caucus night rally at Drake University in Des Moines, Iowa, Monday, Feb. 1, 2016. (credit:ASSOCIATED PRESS)
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Open Image ModalDemocratic presidential candidate Hillary Clinton hugs former President Bill Clinton alongside their daughter Chelsea during a caucus night rally at Drake University in Des Moines, Iowa, Monday, Feb. 1, 2016. (credit:ASSOCIATED PRESS)
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Open Image ModalJane Sanders and her husband Democratic presidential candidate Sen. Bernie Sanders, I-Vt., watch caucus returns in his hotel room, on Monday, Feb. 1, 2016, in Des Moines, Iowa. (credit:ASSOCIATED PRESS)
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Open Image ModalDemocratic presidential candidate Bernie Sanders laughs as he speaks during his Caucus night event at the at the Holiday Inn February 1, 2016 in Des Moines, Iowa. (credit:Joshua Lott via Getty Images)