Senator Ted Cruz, a Republican from Texas and 2016 presidential candidate, thanks Scott Walker, governor of Wisconsin and former 2016 presidential candidate, left, as he speaks during a campaign event in Milwaukee, Wisconsin, U.S., on Tuesday, April 5, 2016. Cruz beat billionaire Donald Trump in Wisconsin's Republican presidential primary, embarrassing the front-runner, extending an increasingly bitter nomination fight and boosting the odds of a contested national convention in July. Photographer: Daniel Acker/Bloomberg via Getty Images
