Moving beyond the 10 House Republicans who voted to impeach him this year, Mr. Trump is now threatening to unseat lawmakers who voted for the bipartisan infrastructure bill. He taunts Senate Republican Leader Mitch McConnell as an “old crow” on a near-daily basis, while demanding that Mr. McConnell be removed from his leadership post. And, most alarming to the clubby cadre of Republican governors, Mr. Trump has already endorsed two challengers against incumbent governors and is threatening to unseat others.

“Saving America starts by saving the G.O.P. from RINOs, sellouts and known losers!” Mr. Trump said last week, using the acronym for “Republicans in name only.”…

More broadly, Mr. Trump is complicating Mr. McConnell’s recruitment campaign by making clear his contempt for the sort of center-right Republicans who refuse to echo his lies about last year’s election. Two New England governors, Chris Sununu of New Hampshire and Phil Scott of Vermont, indicated this month that they would not run for the Senate, Mr. Hogan appears more intent on pursuing a long-shot presidential campaign, and Mr. Ducey continues to insist that he will not challenge first-term Senator Mark Kelly.

“I’m not running for the United States Senate, and I’m 100 percent focused on this final year as Arizona’s governor,” Mr. Ducey said in Phoenix, while voicing his respect for Mr. McConnell, who is wooing him with the ardor and attentiveness of a college football coach pursuing a five-star high school quarterback.