The FBI disclosed that it received more than 4,500 tips on a phone line in 2018 as part of a background investigation into then-Supreme Court nominee Brett Kavanaugh and provided “relevant” ones to former President Donald Trump’s White House counsel.

The exact number of tips was disclosed in a June 30 letter released by Sen. Sheldon Whitehouse on Thursday. The letter was in response to a two-year-old request from Senate Democrats seeking more information about the handling of the investigation.

The revelation reignited fierce accusations from liberals who say that the FBI and the Trump White House did not sufficiently examine allegations against Kavanaugh in the wake of accusations from Dr. Christine Blasey Ford that he had sexually assaulted her at a party in the Maryland suburbs when they were both in high school.

The allegations nearly derailed his confirmation, and Kavanaugh has always fiercely denied them. Kavanaugh was ultimately confirmed by a vote of 50-48.

In the letter, Assistant Director Jill Tyson said that Kavanaugh’s nomination was the first time that the FBI set up a tip line for a nominee undergoing Senate confirmation and that the tips included phone calls and electronic submissions