MILWAUKEE – On the Republican side, Donald Trump is supported by 24 percent, followed by Marco Rubio at 18 percent and Ted Cruz at 16 percent, among respondents who say that they will vote in the Republican primary. Ben Carson is backed by 8 percent, with Chris Christie at 5 percent. Rand Paul and Carly Fiorina receive 3 percent each. Jeb Bush and John Kasich are each at 2 percent, with Mike Huckabee at 1 percent and Rick Santorum at 0. Carson led the Republican field in November at 22 percent, with Trump and Rubio each at 19 percent. Cruz...