Politifact took a look at the RNC breach. But I agree, it doesn’t make much sense to me why almost the entire party (at the national level, at least) is committing a slow political suicide. We all know Mueller is going to find, like, so many dead hookers in Trump’s trunk. So why is anyone still hitching their wagon up to his? Short-term political gains at the expense of being on the wrong side of history? Maybe they honestly don’t care.
I think you overestimate the likelihood that any of them will actually face consequences, but they don't. I think the Republican leadership was worried when Trump was elected, but once he made it through a few months without going to jail, it became clear that actual accountability is no longer a thing.
I think that if McConnell or Ryan were able to be blackmailed they would have been blackmailed long since. I've got my own pet conspiracies but I'm also with Benjamin "three can keep a secret if two are dead" Franklin. Really - what have we really learned about Trump that's surprising over the past 18 months? He's grab'embythepussy through and through, all we're learning is specifics. The logical conclusion is that McConnell and Ryan know they're going to survive Trump. Last time McConnell won he was up by 16 points. Ryan has never come within ten points of losing in eleven elections - he won his first election 81 to 19. If these guys can keep their constituents happy, they get to keep playing long after Trump is gone. Meanwhile they've been at it long enough to know that if they keep their noses clean in an election year they're golden.