Why? Why does he do this? Why does he lie when we all know the truth? What is wrong with him?
I believe that this is going to be the new mode of politics, and that it is here to stay. Trump has shown that what works in advertising on most buyers also works on most voters. Namely, it doesn’t matter what you say - all that matters is how you make the listener feel. There is absolutely no requirement for veracity whatsoever. There is nothing “wrong” with him - the discovery has begun a new era. Dark times ahead, that’s my opinion.