Former acting Attorney General Sally Yates testified to the Senate Judiciary Subcommittee Monday that she’d warned the White House less than a week into the Trump presidency that former National Security Adviser Michael Flynn was lying about whether he had discussed U.S. sanctions with Russian Ambassador Sergey Kislyak, and that these public and private lies made him susceptible to blackmail.

Sally Yates: “We were concerned that the American people had been misled about the underlying conduct and what General Flynn had done, and, additionally, that we weren’t the only ones that knew all of this, that the Russians also knew about what General Flynn had done. And the Russians also knew that General Flynn had misled the vice president and others. And that created a compromise situation, a situation where the national security adviser essentially could be blackmailed by the Russians.”

Yates’s testimony renewed questions about why President Trump disregarded her warning and did not oust Flynn until 18 days later, after Flynn’s lies were revealed by the press.