Biden Says He Has Authority to Challenge Debt Limit, but No Time

President Biden said on Sunday that he believed he had the authority to challenge the constitutionality of the nation’s borrowing limit but that he did not believe such a challenge could succeed in time to avoid a default on federal debt if lawmakers did not raise the limit soon.

“I think we have the authority,” Mr. Biden said at a news conference after the Group of 7 summit in Hiroshima, Japan. “The question is could it be done and…