If SCOTUS finds him ineligible, and by that time there is an R majority, I would assume they’d get him out. Impeachment’s too good for him, since he isn’t a real president anyway. But maybe they’d do that.
Congress will put up as much fight and resistance as Obama. Keep in mind that not one single member of Congress raised the issue of dual citizenship when it had the opportunity - not during the primary season, not during the general election campaign, and not at the time the electoral ballots were counted.
Congress was (and is) derelict - all the more reason to throw the bums out, in my opinion. Every stinking one of them. Even the "good" ones stood mute, the entire time. As far as Congress is concerned, dual citizenship, split allegiance at birth, is "good enough" in light of the 14th amendment and Wong Kim Ark.