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 TrumpClinton, Bush, Obama reflect on peaceful transition of power on Biden's Inauguration Day Arizona Republican's brothers say he is 'at least partially to blame' for Capitol violence Biden reverses Trump's freeze on .4 billion in funds MORE radicalized the rioters that stormed this Capitol," Rep. Ken BuckKenneth (Ken) Robert BuckProgressive groups warn against appointing tech insiders to key antitrust roles House Republican condemns anti-Trump celebrities during impeachment hearing Pompeo, Cruz and other Trump allies condemn Twitter's ban on president 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 SandersHouse Republican condemns anti-Trump celebrities during impeachment hearing Sarah Sanders on Trump's reported war dead criticism: 'Those comments didn't happen' Sarah Sanders memoir reportedly says Trump joked she should hook up with Kim Jong Un MORE Sanders and former Department of Homeland Security Secretary Kirstjen NielsenKirstjen Michele NielsenRosenstein: Zero tolerance immigration policy 'never should have been proposed or implemented' House Republican condemns anti-Trump celebrities during impeachment hearing Acting DHS chief Chad Wolf stepping down MORE.