Donald Trump, 2016 Republican presidential nominee, left, greets attendees during the 2nd annual Roast and Ride hosted by Senator Joni Ernst, a Republican from Iowa, not pictured, in Des Moines, Iowa, U.S., on Saturday, Aug. 27, 2016. Ernst, who in 2014 won the Senate seat vacated by Democrat Tom Harkin when he retired, has turned her Roast and Ride into the conservative answer to the Harkin's legendary Steak Fry fundraiser, which auditioned dozens of presidential candidates over its 37-year history. Photographer: Daniel Acker/Bloomberg via Getty Images
