I think part of the issue with Trump is that--to many people--he's already failed at this. Usually, once a major party candidate wins the nomination, they start

I think part of the issue with Trump is that--to many people--he's already failed at this. Usually, once a major party candidate wins the nomination, they start moving their positions towards the center in order to capture mainstream/moderate voters. Trump has not done this; in fact, he's tended to do the opposite. He still hasn't backed off The Wall, for instance. Granted, this is still just "talk," but to people like me, it's indicative of how he tends to double-down instead of moderating himself. I don't have a lot of confidence he would begin moderating himself once presented with actual power.