Sen. Jeff Flake, R-Ariz., said he was troubled by the way Supreme Court nominee Brett Kavanaugh behaved before the Senate Judiciary Committee last week.

“The interaction with the members was sharp and partisan and that concerns me,” Flake said Tuesday at a Atlantic Festival event in Washington, D.C. while while discussing the way the judge defending himself against allegations of sexual assault.

“You give a little leeway because [of] what he’s been through. But on the other hand, we can’t have this on the court. We simply can’t,” he added.

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Kavanaugh gave combative testimony after an emotional Christine Blasey Ford said she was “100 percent” certain Kavanaugh had sexually assaulted her when the two were in high school. The judge has vehemently denied doing so.

In one instance, Sen. Amy Klobuchar, D-Minn., engaged in a tense exchange with Kavanaugh when she questioned him about his drinking habits.

Kavanaugh responded to Klobuchar by twice questioning whether she had blacked out while drinking. He later apologized for his comments.

The judge also claimed the Democrats trying to sink his nomination had sought “revenge on behalf of the Clintons” for his role assisting independent counsel Ken Starr in investigating then President Bill Clinton.

Flake voted Friday to advance Kavanaugh’s nomination out of committee, but called for an FBI investigation into the allegations. Under pressure from senators in his own party, Trump authorized a week-long supplemental background investigation on Friday.