CNN's Chris Cuomo breaks down President Trump's firing of two key impeachment witnesses, Gordon Sondland and Alexander Vindman.

US Ambassador to the EU Gordon Sondland, a key impeachment witness, says he is being recalled from his post.

Two days after his Senate impeachment acquittal, President Donald Trump has emerged emboldened and vindictive, making it clear he harbors resentment toward some of the witnesses who testified in nationally televised hearings during the House inquiry.

"History will not be kind to Donald Trump," Adam Schiff soberly intoned in his closing statement Monday during the impeachment trial.

Democratic House impeachment managers believe President Donald Trump has not learned anything from his recently concluded impeachment trial and will likely continue the same behavior while in office, they told CNN in an exclusive interview.

The tip-off was the fake, breathy voice -- call it Mister Rogers-on the-dark side -- that the President uses whenever he is enraged but wants us to think he's calm. He smiles and leans forward, and then spews venom in a treacly tone. Although he called it a "celebration" of his acquittal in the Senate impeachment trial, Trump's hourlong ramble in the White House on Thursday sounded more like a recriminating diatribe.

CNN's Anderson Cooper talks with House impeachment managers from President Trump's impeachment trial in an exclusive interview airing Friday night at 8p ET.

The remarkable resiliency of President Donald Trump will pay dividends for his Republican Party, as it further unifies behind him in the wake of impeachment and ahead of what is sure to be a savage reelection campaign.

CNN's Gloria Borger discusses the President Trump's remarks following his acquittal in the Senate impeachment trial.