A Democratic senator wants to know if Supreme Court nominee Brett Kavanaugh ever received email from an alleged “sexually explicit email list” run by a former federal appellate judge who resigned amid sexual misconduct allegations.

Alex Kozinski served on the U.S. Court of Appeals for the 9th Circuit, for over 30 years until he retired in December amid allegations of sexual misconduct. Kavanaugh clerked for Kozinski in 1991, and Sen. Chris Coons of Delaware wants to know if the high court nominee was part of the illicit email list.

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“It has been reported that Judge Kozinski had a sexually explicit email list, called the Easy Rider Gag List,” Coons wrote in a 13-page document containing questions spurred by or not asked during Kavanaugh’s four-day Senate Judiciary Committee confirmation hearing last week.

“Did you ever receive an email from this list? If it is necessary to refresh your recollection, please review your email accounts before answering this question,” Coons directed Kavanaugh.