Iowa gets ready to caucus

Republican presidential candidate, Sen. Ted Cruz, R-Texas, speaks during a caucus night rally in Des Moines, Iowa.

Democratic presidential candidate, Sen. Bernie Sanders and his wave Jane acknowledge the crowd as he arrives for his caucus night rally in Des Moines, Iowa.

People cheers as Republican presidential candidate Sen. Ted Cruz is declared the winner at the caucus night gathering at the Iowa State Fairgrounds on in Des Moines, Iowa.

Republican presidential candidate Donald Trump speaks at his Iowa Caucus night gathering in Des Moines, Iowa.

Supporters watch as results are displayed on a television during the caucus night event of Democratic presidential candidate former Secretary of State Hillary Clinton in the Olmsted Center at Drake University in Des Moines, Iowa.

Supporters 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.

Precinct secretary Michelle Anderson counts votes for Republican candidates during a caucus in Nevada, Iowa.

Caucus attendees sign in as they arrive at a Democratic Party Caucus at Jackson Township Fire Station on February 1, 2016 in Keokuk, Iowa. After months of fierce campaigning, Iowans take the first steps in deciding which candidate will receive their respective party nomination for the US presidency. / AFP / Michael B. ThomasMICHAEL B. THOMAS/AFP/Getty Images ** OUTS - ELSENT, FPG, CM - OUTS * NM, PH, VA if sourced by CT, LA or MoD **  (MICHAEL B. THOMAS / AFP/Getty Images)

Democratic presidential candidate Sen. Bernie Sanders watches caucus returns in his hotel room in Des Moines, Iowa.

Republican presidential candidate Donald Trump, center, accompanied with wife, Melania, second from right, pauses for a selfie while visiting Saint Francis of Assisi Church, a caucus site in West Des Moines , Iowa.

Voter Margaret Law reacts to seeing Republican presidential candidate Sen. Marco Rubio, R-Fla., at a caucus site, Monday in Clive, Iowa.

Republican presidential candidate, Sen. Ted Cruz, R-Texas, speaks at Green County Community Center in Jefferson, Iowa.

Republican presidential candidate, Sen. Ted Cruz poses for a photo with a member of the audience during a campaign event at the Grace Baptist Church in Marion, Iowa.

Former Governor of Alaska Sarah Palin speaks before introducing Republican presidential candidate Donald Trump during a campaign event at the U.S. Cellular Convention Center in Cedar Rapids, Iowa.

The head of an Uncle Sam eagle sits on a bar stool at the Marriott hotel bar in Des Moines.

Democratic presidential candidate Hillary Clinton speaks at Abraham Lincoln High School in Des Moines on Sunday, a day before the first nominating contest of the 2016 election.

Republican presidential candidate Donald Trump, with his wife, Melania Trump, signs autographs after a campaign rally at the Gerald W. Kirn Middle School in Council Bluffs, Iowa.

Republican presidential candidate Sen. Marco Rubio of Florida makes his case at a campaign rally at the University of Northern Iowa in Cedar Falls.

Republican New Jersey Gov. Chris Christie, at a pub in West Des Moines, Iowa, makes a passionate plea on Sunday for supporters to get out and caucus for him the next day.

Republican Sen. Rand Paul of Kentucky speaks during a campaign event at the University of Iowa in Iowa City.

Republican presidential candidate Ben Carson poses with an audience member after a campaign event at Fireside Pub and Steak House in Manchester, Iowa.

People listen to New Jersey Gov. Chris Christie at a campaign event at the Quaker Steak & Lube in Council Bluffs, Iowa.

A supporter of Democratic presidential candidate and former Maryland Gov. Martin O’Malley campaigns on a busy Des Moines street corner during morning rush hour Monday.