The late Sen. John McCain John Sidney McCainThe Memo: Trump's strengths complicate election picture Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' Cindy McCain: Trump allegedly calling war dead 'losers' was 'pretty much' last straw before Biden endorsement MORE (R-Ariz.) listed off the names of dictators while watching President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's inauguration, according to Sen. Amy Klobuchar Amy KlobucharSocial media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (D-Minn.).

HuffPost reported that during a campaign event in Iowa, the 2020 Democratic presidential contender told the crowd of more than 200 about sitting next to McCain and Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.) during Trump's inaugural address.

“I sat on that stage between Bernie and John McCain, and John McCain kept reciting to me names of dictators during that speech because he knew more than any of us what we were facing as a nation,” she said. “He understood it. He knew because he knew this man more than any of us did.”

The new story from Klobuchar adds to a list of extensive criticism from McCain, who was one of few Republican senators to regularly oppose the president.

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Trump and McCain feuded on and off before the senator's death, and Trump has repeated his criticism of the late Arizona lawmaker even after his funeral.

In March, Trump ramped up his criticism of McCain, accusing him of handing a dossier of explosive claims about Trump’s ties to Russia to the FBI for “very evil purposes.”

At the time, he told reporters, “I was never a fan of John McCain, and I never will be.”

He also complained about not receiving a “thank you” for approving funeral arrangements for McCain, despite his dislike for the former senator. McCain was memorialized at Washington’s National Cathedral last fall, and Trump was not invited to attend.