The people that supported trump were always going to support him and be energized to vote. That’s a big part of why focusing on his lies was such a waste of time, it wasn’t going to change any minds. Winning elections is about motivating your base, undecided voters are a wash and opposing voters aren’t likely to massively shift.
Nothing is going to happen to social security, at least for the old people. If you’re in your 30s or less, it might not exist by the time you’re eligible, but that has little to do with trump.