DT is not compos mentis so a physical ailment picked up in Asia would be the final straw. When mind, body and spirit are all ill, a biologic inertia quickly slows to a stop.

I have found that victims often have a propensity to support/wish for some kind of Armageddon rather than wait for a false and corrupt justice to remedy their situation. Call it anger but it is real and sincere. Most people with empathy turn this anger inward and kill themselves. This is why 2/3rds of US veterans commit suicide.
{Yes Virginia the rate is that high.}

These people are part of his base. It is rational that if one election is won, then he can do it again with new improved social media manipulation.

An anti hero once said "to succeed you have to be first by any means and if not, you have to cheat."