A GOP congressman assailed Democrats in Congress for not condemning anti-Trump celebrities, name-checking Madonna and Robert De Niro during the president's impeachment hearing on Wednesday.

"I've heard President TrumpDonald TrumpUS gives examples of possible sanctions relief to Iran GOP lawmaker demands review over FBI saying baseball shooting was 'suicide by cop' House passes bill aimed at stopping future Trump travel ban MORE radicalized the rioters that stormed this Capitol," Rep. Ken BuckKenneth (Ken) Robert BuckHillicon Valley: Tech companies duke it out at Senate hearing | Seven House Republicans vow to reject donations from Big Tech Seven House Republicans vow to reject donations from Big Tech Hillicon Valley: Apple approves Parler's return to App Store | White House scales back response to SolarWinds, Microsoft incidents | Pressure mounts on DHS over relationship with Clearview AI MORE (R-Colo.) said while the House debated an impeachment article over the president's role in inciting his supporters to attack the Capitol last week.

"And I would say we need to look no further than ourselves to find out what happened and to look at history," Buck continued.

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"Americans were frustrated when they learned the FBI was investigating the Trump campaign," he said, before naming several high-profile celebrities critical of the commander in chief.

"And then, the socialists in Hollywood joined their allies in Congress. Robert De Niro said that he wanted to punch the president in the face," Buck said.

"Madonna thought about blowing up the White House. Kathy Griffin held up a likeness of the president's beheaded head."

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Madonna defended those remarks at the 2017 Women's March on Washington, saying days after the event that she was "not a violent person."

In 2017, comedian Griffin drew intense backlash and faced canceled tour dates after posing for a photo shoot with a prop meant to look like Trump's severed head.

"And nothing was said by my colleagues at that point in time," Buck said Wednesday. "In fact, one Democrat colleague said that Trump supporters should be harassed wherever they are," he added, noting incidents involving former White House press secretary Sarah HuckabeeSarah SandersAndrew Giuliani planning run for New York governor Trump appears at Sarah Huckabee Sanders campaign event Trump likely to form new super PAC MORE Sanders and former Department of Homeland Security Secretary Kirstjen NielsenKirstjen Michele NielsenLeft-leaning group to track which companies hire former top Trump aides Rosenstein: Zero tolerance immigration policy 'never should have been proposed or implemented' House Republican condemns anti-Trump celebrities during impeachment hearing MORE.