text:  Tevi Troy has followed several of these conservative movements. He's a presidential historian and former White House aide to George W. Bush. He says it's hard to track what Trump wants or needs because he's so transactional and doesn't want to be saddled with things that are unpopular. And as soon as there was deviation, as soon as there was separation between what that person thought and what Trump thought, then either Trump jettisoned the person or the person lost their relevance.