Senate Majority Leader Mitch McConnell is beset. His own party’s president has no problem trashing him publicly as a good-for-nothing. Steve Bannon is threatening to back primary challengers to all of his incumbent senators up for re-election. And on Wednesday, several conservative groups, whose fundraising models largely consist of dunking on McConnell, released a ranty letter calling on the entire five-person Senate leadership team to resign for being, in their estimation, comprehensively useless.