Sen. Ted Cruz attends campaign event with Rick Perry in a barn at Harken Hills Ranch in Osceloa, Iowa

Texas Sen. Ted Cruz, (C), 2016 Republican presidential candidate, shakes hands with a supporter as he sits with former Texas Gov. Rick Perry (R), as they wait to make remarks at a campaign event in a barn at Harken Hills Ranch, January 26, 2016, in Osceola, Iowa. Cruz is running against a large field of GOP candidates, including real estate mogul Donald J. Trump, Florida Sen. Marco Rubio and retired neurosurgeon Ben Carson ahead of Iowa's first-in-the-nation caucuses, February 1. Photo by Mike Theiler/UPI