Stephen ColbertStephen Tyrone ColbertSchiff returning to 'The Late Show' Clinton still 'disappointed' Sanders held off on endorsing her in 2016 De Niro: Life for Americans during the Trump presidency is like 'living in an abusive household' MORE suggested Tuesday on CBS's "Late Show" that the recent controversy involving President TrumpDonald John TrumpTrumps light 97th annual National Christmas Tree Trump to hold campaign rally in Michigan 'Don't mess with Mama': Pelosi's daughter tweets support following press conference comments MORE and Ukraine "might be the thing" that ends the presidency.

"For 2 ½ years, Donald Trump has had scandal after scandal: Russian collusion, obstruction of justice, saying Nazis are fine people, being an unnamed co-conspirator to campaign finance violations, lying about the Moscow Trump Tower, stealing money to pay for the border wall, faking the weather with a Sharpie," Colbert said to open his show.

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"Every time, people have asked, 'Is this the thing? Surely this must be the thing,' and every time, it wasn't the thing. But here's the thing: There's a new thing, and it might be the thing because this afternoon, Nancy PelosiNancy Pelosi 'Don't mess with Mama': Pelosi's daughter tweets support following press conference comments Bloomberg: Trump should be impeached On The Money: Congress races to beat deadline on shutdown | Trump asks Supreme Court to shield financial records from House Democrats | House passes bill to explicitly ban insider trading MORE did this thing."

Colbert then played a clip of House Speaker Nancy Pelosi (D-Calif.) announcing a formal impeachment inquiry. The clip elicited a standing ovation from the crowd.

Pelosi's announcement Tuesday came after increasing pressure within the House Democratic caucus amid reports that Trump pressed Ukrainian President Volodymyr Zelensky to investigate former Vice President Joe BidenJoe BidenTrump to hold campaign rally in Michigan Castro hits fundraising threshold for December debate Buttigieg draws fresh scrutiny, attacks in sprint to Iowa MORE and his son Hunter Biden earlier this year.

Trump has defended his conversations with the Ukrainian leader and said he has authorized the release of a transcript of his July call with Zelensky.

The president’s conversations also launched a complaint from a whistleblower within the administration that the executive branch has refused to turn over to lawmakers.

Pelosi’s move on Tuesday does not definitively mean the House will vote on articles of impeachment, and House committees have already been investigating Trump.