CHICAGO, IL - JULY 27: Republican presidential hopeful Wisconsin Governor Scott Walker washes down a "cheezborger" with a Schlitz beer at the famed Billy Goat Tavern during a campaign stop on July 27, 2015 in Chicago, Illinois. Recent polls have Walker leading all Republican contenders in Iowa but trailing businessman Donald Trump and former Florida Governor Jeb Bush in New Hampshire. (Photo by Scott Olson/Getty Images)
