Trump is deteriorating before our eyes. When authoritarians, or malignant narcissists, feel cornered they become volatile and dangerous. Trump is going to feel increasingly cornered as real pushback and accountability begins to occur after the midterms. Desperate for a power display, I believe Trump will concoct a reason to use a nuclear weapon. Just one! He's always wanted to, and his likely frontotemporal dementia is progressively removing any checks on his inner madman. Save this prediction for 18 months from now
Lest you count on people in the military chain of command to put the kibosh on his demand, I'm sorry to inform you but there are no military nuclear release procedures for telling the Commander in Chief "no." His Cabinet or the Congress has that job.
My best hope is that our friend Mr. Natural Causes intervenes long before this can occur. Unfortunately that occasion opens a whole new can of worms for us because then The Ideology® will set in hard under the new Vance regime. But he doesn't have a fascination with nukes. What he does have is a dedication to extreme racism and misogyny, declaring emergency domestic powers, and all the attendant human suffering he can dish out.