More than two dozen progressive groups are asking House Democrats to investigate Supreme Court Justice Brett Kavanaugh Brett Michael KavanaughOvernight Health Care: US coronavirus deaths hit 200,000 | Ginsburg's death puts future of ObamaCare at risk | Federal panel delays vote on initial COVID-19 vaccine distribution Senate GOP sees early Supreme Court vote as political booster shot Trump says he'll make Supreme Court pick on Saturday MORE’s confirmation process.

“Senate Republicans made a mockery of their constitutional responsibility to provide ‘advice and consent’ on the president’s nomination of Justice Kavanaugh, and the American people deserve to know how and why the process was such a sham,” the groups wrote in a letter to the House Judiciary and Oversight committees.

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“The public is just as entitled to a thorough review of Justice Kavanaugh’s record now as it was before he was elevated to the Supreme Court and to know whether allegations against him of sexual assault and perjury have any factual basis,” they added.

Kavanaugh nomination came under renewed scrutiny after he was accused of sexual assault from when he was a high school student, as well as sexual misconduct from his time in college. He has denied all allegations against him.

Progressive groups argue that the Senate confirmation process was tainted.

An FBI investigation cleared Kavanaugh of any wrongdoing connected to the sexual assault claims. Republicans seized on the conclusions as evidence that Kavanaugh should be confirmed, while Democrats noted the FBI failed to interview key witnesses, including Kavanaugh and Christine Blasey Ford, one of his accusers who also testified in front of the Senate Judiciary Committee.

“The Republican majority in the Senate initially resisted opening any sort of investigation into the allegations, but eventually relented to calls for an additional hearing and a supplemental FBI background check," the groups wrote in their letter to the House panels. "However, the hearing raised more questions than it answered, and the supplemental FBI investigation was so limited as to be virtually meaningless.”

The letter was first reported by BuzzFeed News.

The letter calls on the House committees to review documents from Kavanaugh’s time in the White House. Senate Republicans released those files after a vetting process run by an outside lawyer, but Democrats said the process was bungled and delayed.

The groups also asked for a review of Kavanaugh's personal financial debts that the White House attributed to purchasing baseball tickets and home improvements.