The one essential truth you must always keep in mind is that Trump lies. He lies about everything. Important things. Unimportant things. He lies about people. About history. About opponents. Even about friends. He lies just by suggesting they're friends. He lies about the past and relates things that never happened. He lies about the future and promises things that will never happen. He lies about his  beliefs and falsely claims to think things that others think. He lies about his own abilities, and knows that they are lies. So the most important thing you must keep in mind between now and November 3, is if Trump is talking, he is lying.