U.S. Republican presidential candidate, and former Arkansas Governor Mike Huckabee, formallly launches his bid for the 2016 Republican presidential nomination during an event in Hope, Arkansas May 5, 2015. REUTERS/Mike Stone
Potential 2016 Republican presidential candidate and former Florida Governor Jeb Bush waves as he departs after speaking to the Greater Salem Chamber of Commerce in Salem, New Hampshire May 21, 2015. REUTERS/Brian Snyder
Former presidential candidate Mitt Romney and former heavyweight boxing champion Evander Holyfield stare each other down at the weigh-in ahead of their upcoming charity boxing match in Utah on Friday night. REUTERS/Jim Urquhart.