Sen. Bob Menendez, D-N.J., on Thursday called the FBI’s supplementary investigation into allegations of sexual misconduct against Supreme Court nominee Brett Kavanaugh a “bullshit investigation.”

“If that’s an investigation, it’s a bullshit investigation,” Menendez said after viewing the documents. “The reality is that that is not a full and thorough investigation. Evidently, the Republicans who gave the directions to the FBI of what could be investigated — it was extremely limited.”

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“You don’t get corroboration if you don’t talk to corroborating witnesses,” Menendez added.

Kavanaugh has been accused by multiple women of sexual misconduct, including Christine Blasey Ford, who claims Kavanaugh forced himself upon her in the 1980s at a high school party, and Deborah Ramirez, who claims that Kavanaugh exposed himself to her at a college party when they were freshmen at Yale University. Kavanaugh has denied all allegations.

Democrats have been critical of the FBI’s investigation, and have argued that not enough witnesses were interviewed. White House spokesman Raj Shah said during an interview with CNN on Thursday morning that the FBI had interviewed nine sources.

Ranking member of the Senate Judiciary Committee Sen. Dianne Feinstein, D-Calif., was also critical of the FBI’s probe.

"The most notable part of this report is what's not in it. The FBI did not interview Brett Kavnauagh, nor did the FBI interview Dr. Blasey Ford," Feinstein told reporters earlier Thursday. "Deborah Ramirez's lawyer said he was unaware of any corroborating witnesses who were interviewed."

The legal team for Ramirez also condemned the FBI for its “failure” to interview additional witnesses that could corroborate their client’s allegations, after providing the FBI with a list of 20 witnesses that Ramirez “suspected” could back up her allegations.

A procedural vote for Kavanaugh’s confirmation is slated for Friday, paving the way for a final vote as early as Saturday.