Late-night host Stephen Colbert on Monday mocked 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 performance during a joint press conference with Russian President Vladimir Putin during which he refused to say if he believes Moscow interfered in the 2016 election.

Colbert told the audience on "The Late Show" that Trump's remarks had "shaken me to my core."

“And I don’t think I need to point out that, at 54, there’s not a lot of core left," he joked.

The late-night host chided Trump for numerous aspects of his performance. Colbert compared Trump saying he has confidence in Putin's denials of meddling to "throwing your intelligence community under the bus" and "turning them into road burger."

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Colbert also mocked Trump's use of Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE's emails and a Democratic server to deflect questions about whether he believes Russia interfered.

“We know where the server is. He’s standing right next to the master," Colbert said.

During Monday's press conference in Finland, Trump said his intelligence officials have told him Russia interfered, but noted that Putin offered a "very strong" denial.

He concluded that he has confidence in "both parties," but added that he didn't "see any reason why it would be" Russia.

The president went on to deny that he colluded with Russia in the election, recounted his victory over Hillary Clinton and called special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's investigation "ridiculous."

Trump's performance was widely condemned by Democrats, Republicans, media personalities and even some of the president's staunchest supporters.

Colbert joked that Trump had received "the worst reviews I’ve seen since Titanic."

"And I don’t mean the movie. ‘One star. I drowned. Great band, though,'" he said.