The top two Republicans in Congress said on Monday that they supported investigations into possible Russian cyberattacks to influence the American election, setting up a potential confrontation with President-elect Donald J. Trump in his first days in office.
“Any foreign breach of our cybersecurity measures is disturbing, and I strongly condemn any such efforts,” said Senator Mitch McConnell, Republican of Kentucky and the majority leader, adding, “The Russians are not our friends.”
Mr. McConnell’s support for investigating American intelligence findings that Moscow intervened in the election on Mr. Trump’s behalf could presage friction between the Republicans who control Congress, and who have long taken a hard line against Russia, and the president-elect, who has mocked the findings.