Quoted: University of Wisconsin-Madison political scientist Ken Mayer has similar expectations for Walker, along with much of the other candidates in the debate. However, he notes the one “wild card” is Donald Trump. The current leader in the polls has been making headlines with controversial statements on the campaign trail. Mayer says it’s unlikely Trump will keep a low profile on stage, and could try to “stir things up” on stage by interrupting or making other statements.