Mitch can't stand it that he has little control over Marjorie Taylor-Greene and finds her batshittery very unbecoming of the Republican Party.
Yes, she is loony, but it is a matter of picking your poison as which kind of current Republican is worse: the brazen nutjob or the corrupt pol who hamstrings Congress to the point it gets nothing done.
Some details are here.
"Loony lies and conspiracy theories are cancer for the Republican Party and our country," McConnell said in a statement. "Somebody who's suggested that perhaps no airplane hit the Pentagon on 9/11, that horrifying school shootings were pre-staged, and that the Clintons crashed JFK Jr.'s airplane is not living in reality. This has nothing to do with the challenges facing American families or the robust debates on substance that can strengthen our party."
Translation: Shut up, MTG, you are screwing over our chances in 2022.
Vid:
Democrats are also not happy with Greene's antics and want her removed from a House committee: