They can’t win the PV without Trump being on the ballot and driving millions upon millions of low-propensity voters to the polls
Absolutist words like can't are dangerous because any scenario that leads them doing so, disapproves it.
There are ways to a majority without Trump. In fact, it gets easier without him spooking the bejeesus out of a lot of natural GOP voters. Mormons, Suburban Seniors (especially in a number of Southern states), and many midwest suburban areas as well.
Lack of trump also removes constraints on individual candidate outreach and because you are running 435 candidates instead of one, you can cast a wider net without the President's administration curtailing your reach.
Also, Republicans have a very successful history of scaring their people into voting with threats both real and imagined. They may not get every Trump voter out, but they will get a large number of them.
