Seems to me like he is prepping for the end game.
The language and rhetoric at its core, if you ignore the endless crap he spouts off between, is that everything said about him that is bad is a lie, and that these people are out to get him. he is essentially priming these people for civil war when he is either impeached or declared unfit. I would suggest its because he knows one of those two is likely to happen soon enough.
Hos base will never accept whatever evidence is put forward against him because he has told them, pretty much since january, that it is all lies. He will destroy the country on his way out I think, I suspect the US will be a relatively untouched coast of affluent cities, and a post apocalyptic center full of violence, lawlessness and decay.