Look, Trump’s going to run again if for no other reason than that Twitter will have to let him access the presidential account. That alone is motivation enough.
Seriously though, something the previous presidential election cycle rammed into me is that it’s very difficult to tell early on who will even run in the first place. If you had told me this early into the election from 2016 that Donald Trump would not only perform well in the primary but win the general I’d have assumed you fell asleep watching a “Back To The Future” marathon.
Anyway, I voted “other”.
I think Twitter would just ban the Presidential account preemptively if Trump wins.
Are they allowed to do that? That account represents the United States - Trump's banned account was him in a personal capacity. To some people it's a distinction without a difference but to me it raises far more questions about censorship which unlike Trump's ramblings would be fairly legitimate.