“I have a serious question,” said Mark Levin on his radio program Tuesday night. “Will Trump be more Nixon or Reagan?” His question focused on the policy positions of the two former Republican presidents. Some of Trump’s recent comments should have conservatives wondering — perhaps not quite worrying — but wondering. The new president-elect has walked back or been silent on many major campaign promises, including the building of a border wall, cancelling the Paris climate agreement, and prosecuting Hillary Clinton. “Of course, we are told to ignore this,” Levin said. “I want [Trump] to succeed, but I want him...