Surely it must have occurred to many people that Trump is probably working on a way to become President for Life. I doubt if his malformed personality can cope with the idea that the likes of Putin et al, whom he so admires, see him as just another “here today, gone tomorrow” democratic leader.
I’d say that the second term will be shamelessly rigged. Further progress would be more problematical, but to a man who holds the norms of responsible, moral and decent behaviour in contempt, the suborning of the Constitution of the United States wouldn’t be out of the question. There are plenty of people who’d support him, even if they were to regret it later, when it would be too late.