That Clause is a show-stopper.
What might happen is that Trump becomes a liability to the Republican Party while also losing the support of his base, due to the base finally understanding that all those promises he made, such as building that "beautiful wall" and locking up "Crooked Hillary," were not meant to be kept, that they were just stupid stuff Trump said in order to win votes from stupid people. (Trump once spoke so: "How stupid are the people of Iowa?" Later he won Iowa! From the horse's mouth .... )
This erosion of the Trump presidency will take a while, of course, assuming it ever happens. (Have a look at how Watergate played out for Nixon, that slow loss of support to begin with, but then a sudden loss of support in Congress that led to his resignation.)
Once Trump is left isolated and vulnerable then there might be a Republican/Democratic coalition formed that will go along with impeaching Trump for violations of that Clause, because that is relatively easy to prove, provided that there's a consensus formed that accepts the proof. (Again, it was pretty clear what Nixon had got up to, but to begin with many legislators did not want to accept the obvious truth of that, sticking to party lines as loyal Republicans. Once they were ready to accept the truth though, Nixon was doomed.)
The thing is that Trump has been very free with the insults and the ridicule of a lot of people he needs; he's dumped on people all his life so why stop now? Right now they are taking his abuse, because they have to; he's the newly-elected Republican President, and he's done nothing wrong ... as President. What a lot of baggage he has brought with him, though!
Up until now Trump has lived in this weird bubble. He's rich, or he pretends to be so even when he's not, and he has been surrounded by hirelings and toadies because of that. (As Trump himself said, he can even grab women by the pussy, when they put up with that. Normally you get your face slapped for doing that, at least!)
Even when he was broke his creditors left him to do his "rich bastard" act because that way they lost less money. Washington, D.C., the world of national politics, a world completely foreign to Trump, does not operate that way. It does a little bit, but once there's blood in the water those inside the Beltway sharks are going to
eat Donald up. All those people he has dumped on are not going to be throwing him lifelines then.
Part of my interest in this is that I moved to D.C. just as the Watergate hearings got under way, when I was glued to the TV every night watching this despicable man Richard Nixon finally get what he had coming to him, from the time he first won elective office by smearing Helen Gahagan Douglas as a fellow traveler, and then saved himself with that contemptible "Checkers speech."
https://www.youtube.com/watch?v=EqjwBDH-vhY (Warning! Highly emetic content!)
I spent six years in the Washington area, always keeping up with political events, often being amazed at what those bastards could get away with while the good guys often were thrown overboard. Back then, into the end of the 70's, nobody ever imagined anybody like Donald Trump getting into the White House. Bill Clinton came close, but not very close, and George W. Bush came closer, but still not very close.