The central question for conservatives, on these and other issues, is whether Trump truly experienced radical conversions on issues they care about, or whether he has just learned to say the right things when he needs conservatives' votes. Even on his signature issue of immigration, Trump faulted Mitt Romney for being too tough as recently as 2012. In 2013, he told a group of immigration activists that he supported giving DREAMers a path to citizenship, and was shocked that they didn't have one already. Only now, running for president, has he sung a different tune.Former Alaska Gov. Sarah Palin endorsed...