Donald Trump, president and chief executive of Trump Organization Inc. and 2016 Republican presidential candidate, left, arrives after being introduced by Sarah Palin, former governor of Alaska, during a campaign event in Racine, Wisconsin, U.S., on Saturday, April 2, 2016. New York's primary could be Trump's stepping stone or stumbling block toward the Republican presidential nomination, making what has been an empty electoral exercise suddenly relevant. Photographer: Daniel Acker/Bloomberg via Getty Images
