I'd hope those currently toeing the line but know deep down we're at the point of ludicrous egregiousness would shoot their shot, if given the opportunity. I'd like to believe at least 20% of elected Republicans lack brain damage.
There were several prime opportunities during his last term when those elusive "deeply concerned" (remember that meme?) Republicans could have chosen to act. We could have nipped this all in the bud, convicted him during his impeachment, and moved on from all of this. But those Republicans failed to act. Now even more congressional Republicans have been primaried and replaced by MAGA sycophants. I am, regrettably, past the point of having faith that the Republicans will do the right thing "this time"
Some people put their conscience above their party affiliation. There's a ton of Republicans unhappy with, and even infuriated by Trump. Not many of them in Congress though.