It’s been months since Kevin McCarthy authorized several House committees to begin impeachment inquiries into Joe Biden—caving to the wishful and amorphous demands of his MAGA wing and the G.O.P. base. For years, these cohorts and their elected representatives in the lower chamber have insinuated, typically in the just-asking-questions tense, that the president profited from his son Hunter’s various business dealings in Ukraine and China, and that then-Speaker McCarthy, with the power of the gavel in his hands, was duty-bound to investigate. Even if, as Republicans privately acknowledged, they were fumbling in the dark to paint what McCarthy described as a “picture of corruption.”