The Republican candidates - minus Trump - meet for a final debate in Des Moines ahead of the Iowa caucuses, Jan. 28, 2016. The Democratic and Republican Iowa Caucuses, the first step in nominating a presidential candidate from each party, will take place on Feb. 1.
In this photo: (L-R) Senator Rand Paul, New Jersey Gov. Chris Christie, Dr. Ben Carson, Senator Ted Cruz, Senator Marco Rubio, former Gov. Jeb Bush and Gov. John Kasich pose together onstage at the start of the debate held by Fox News for the top 2016 U.S. Republican presidential candidates in Des Moines, January 28, 2016.