Donald Trump canceled his big speech on immigration scheduled for Thursday. It could have something to do with the comments he made to his new Hispanic advisory council suggesting he'd like to find a more "humane" approach to dealing with the undocumented immigrants he has - up to now - wanted to deport. Up to now, his supporters have been loyal despite policy pronouncements contrary to their views. Immigration may be the one area they won't tolerate a back-pedal. We talk about this and more news in politics.