1) you may have missed the fact that I was not talking about a demographic of Trump base fans changing their minds.
2) It does seem that over time more independents and Bush style Republicans are souring on him, and if not outright hatred of Trump, there certainly seems to be a diminishing enthusiasm for voting for him.
3) We all know that historically the demographic that votes less as a percentage is the youth vote. Youth are far less Trump friendly. An increase in youth voting can be a serious factor in close elections when they tend to adopt Democratic views on things like abortion and how you treat gays and women
4) I might be fuller of shit than even my normal, but it seems to me in these “find me 11,000 votes” type elections that a bunch of pissed off young women could play a significant role in registration and turn out, potentially changing the election results. Of course I agree with you that attacking Swift will not change a single MAGA supporter’s opinion of Trump.
But elections aren’t decided by how many people like or don’t like a candidate. They are decided by those who turn out and vote. This is not a like or don’t like thing. This is more an energized turnout thing.