Supporters of Senator Ted Cruz, a Republican from Texas and 2016 presidential candidate, wait to watch the Republican presidential candidate debate during a watch party in Des Moines, Iowa, U.S. on Thursday, Jan. 28, 2016. Candidates from both parties are crisscrossing Iowa, an agricultural state of about 3 million people in the U.S. heartland that will hold the first votes of the 2016 election on Feb. 1. Photographer: Luke Sharrett/Bloomberg via Getty Images