The simpler explanation -- that the cost of being a target of Trump's Twitter wrath represents a career-ending event whereas the cost of lying is a slow bleed and maybe they'll live -- is probably the better explanation for elites. It's rational without invoking signaling.

  • And diehard Trump supporters? I think we can just stay with the CW of political science that they are following elites. From the stuff I see they really believe, for example, that any day now the evidence will emerge that winds Trump the presidency.