I dunno, Donald has a pretty strong hold over a big chunk of the base and Kevin did make the pilgrimage in the wake of J6. If they lose Donald's hardcore base or even a portion of it, they will be screwed at the polls. We will see, but once indicted I expect a speedy trial with appeals made from inside the crowbar hotel. The sentencing guidelines, the nature of the material and the plentiful precedents of harsh sentences should put Donald away for good, unless federally pardoned by a future republican president of course. He will thrash about inside a cage and if he has any hold over the GOP house he will exploit it, if they win the house, whoever wants to be speaker will need Trump's endorsement or support.
In any case it's a good election line, Donald controlling the house from the big house and it could end up being true.