If Senator Chuck Schumer, the New York Democrat and majority leader, is known for anything, it is his singular devotion to President Biden’s agenda, which he has helped steer through Congress, and loyalty to Mr. Biden himself, a former Senate colleague whom he admires and respects. But Mr. Schumer is also passionate about his role as his party’s longtime chief Senate race strategist, a hands-on political geek who digs deep into the numbers of every Senate race and is determined to hold both his narrow majority and the White House in November. Over the past two weeks, as Mr. Biden’s re-election campaign has been plunged into crisis following his disastrous debate performance, those two imperatives have come into direct conflict, posing a dilemma for Mr. Schumer as more and more Democrats — including many in his own ranks — question the president’s ability to continue as the Democratic nominee. In public, the usually talkative Mr. Schumer has been determinedly tight-lipped, sticking to a mantra of “I’m with Joe,” even as some in his caucus call for Mr. Biden to step aside and others express real alarm that if he remains the nominee, he may lose and take the Senate majority and their chairmanships with him.

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Persons: Chuck Schumer, Biden’s, Mr, Biden, Schumer, Joe, ” Organizations: New York Democrat, White House, Democratic