Democratic House leaders stopped short of calling for the resignation of Mr. Santos, a Republican, who may have misrepresented himself in his résumé.

Representative-elect George Santos on Monday faced a barrage of questions, as well as an uncertain future, after an article in The New York Times revealed that he may have misrepresented key parts of his résumé on the campaign trail.

The Times’s report found that Mr. Santos, a Republican whose victory in Long Island and northeast Queens last month helped his party clinch a narrow majority in the House of Representatives,

House Republicans and state party leaders were largely silent on Monday. But Joseph G. Cairo Jr., the Nassau County Republican chairman, said in a statement that The Times’s reporting raised “serious” issues that he believed Mr. Santos should address.

Mr. Santos, 34, has declined numerous requests to be interviewed. On Monday evening, he used Twitter to recirculate a short statement that his lawyer, Joseph Murray, had released on Friday, with one small addition. On Monday

The statement was Mr. Santos’s first public acknowledgment of the questions surrounding his background since Sunday night, when — hours after he had been notified of The Times’s plans to publish its findings

Mr. McCarthy has been working to quell an effort by hard-right lawmakers to threaten his bid to become speaker when Republicans take control of the House

Andres Thaodopoulos, 36, the owner of a Greek restaurant in the Whitestone neighborhood of Queens

According to the fact-checking website PolitiFact, the words probably were not said by Churchill