At this point, I don't think think we can forecast anything to be "the end of Trump." We could only wish it was so. There have been so many occasions for reasonable people to conclude, "That's the final straw!" but it never happens. His supporters (and there are many of them) love him for everything he stands for.
I'm reading a fiction book right now (written before Trump was elected) where one of the evil dudes (a neo-Nazi leader) gives a monologue defending his views by saying, in effect, "People say they want democracy, but what they really want is an authoritarian government. Authoritarian governments make them feel safe, protected." Sadly, it's true. This describes Trump and the appearance of so many other recently-elected authoritarian world leaders who traffic in lies, corruption, conspiracies, divisiveness, xenophobic rhetoric, and being "macho" (Duterte, Bolsinaro, Boris Johnson, Orban, el-Sisi,...)
The people in my family who are Trump supporters -- you could tell them until you're blue in the face about all his corruption and self-serving and disgusting actions, and it wouldn't matter one bit to them. They'd tell you they like that about him and besides, "everyone does it."