question he should be asked is "if trump running in 2024 is a bad thing, why not just ban Trump from the GOP?"
Because they want to keep his voters.
Best result for McConnell is that Dems stop him from running in 2024 all by themselves (maybe Romney and one or two others in lite-Trump states cross the floor).
This way Trump can't tear the party apart but also can't run himself. Not sure Don Jnr can win the nomination.