MILWAUKEE — In her Wisconsin debut as a Donald Trump surrogate, Sarah Palin was met with tepid applause and stone-faced silence Friday night at a Milwaukee County Republican gathering. In contrast, the 750 Republicans at American Serb Hall cheered enthusiastically for Sen. Ted Cruz, who was introduced by Gov. Scott Walker and talk radio host Vicki McKenna. The contrasting receptions illustrated why the Texas senator has surged past the real estate mogul and reality TV celebrity in the latest polls, especially in southeastern Wisconsin. Palin opened with a call for unity among the candidates in supporting former Green Bay Packer...