They can’t do it for plain political reasons because they would be taking an untenably hypocritical position (not that that ever stops them, but this is a high-profile matter). But it’s even more than that: They can’t do it because it would offend Dear Leader, and that, above all, they cannot do.
Donald Trump wants to talk, and talk, about Biden’s age. But he can’t do that effectively if his own party is keeping an 81-year-old man in his rigorous job. Especially when that 81-year-old man has had episodes like these last two.
And besides that, Trump hates McConnell, as we know. The aspersions are numerous. Earlier this month at a South Carolina dinner, where Lindsey Graham was once again sitting at the top of Mount Genuflection, Trump said: “These guys, what they’re doing with the election interference and the Senate has to step up and do something. The House is doing a lot of things. The Senate, under perhaps the worst leader in the history of the country running the Senate, Mitch McConnell, has to stand up and do something.” He also speculated that the Democrats must “have something” on McConnell. That’s Trump’s way of saying that he has something on McConnell, which he wants McConnell to believe, whether it’s true or not.