Twitter is merely labelling a tweet as being factually incorrect, it's not hiding the content.
I know this is a very massive hypothetical, but it’s one I’ve wondered for a while. Basically, as the head of one of the branches, he could have subordinates forcefully removed, but who’ll forcefully remove him in this case?
The good news is that the presidency (and the leader of the executive branch) is very time limited. The constitution is so clear that there is no wiggle room at all, no matter what happens between now and January next year, the only way he stays in power is by winning the election. Also it seems pretty clear there will be a democrat as acting president if we fail to vote for a new one, but that is mostly coincidences and luck this time around.
The last four years have shown that there are no real checks and balances and they depend on one party keeping its own members in line, and that the GOP have moved far, far, to the right as they are loosing the potential to win fair elections. Winding this down is not going to be pleasant, and in the long run we desperately need reforms. Also it seems like the current best case is that the GOP get voted out everywhere, but that is also a terrible outcome, we need a real opposition party and competition of ideas.