Michael D'Antonio is the author of the book "Never Enough: Donald Trump and the Pursuit of Success" and co-author with Peter Eisner of "The Shadow President: The Truth About Mike Pence." The opinions expressed in this commentary are those of the author. View more opinion articles on CNN.

(CNN) 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.

President Donald Trump recapped the many investigations against him over the last three years and directed his vitriol at those who dared oppose him. They are " evil and sick people ," said Trump.

Michael D'Antonio

Rep. "Adam Schiff is a vicious, horrible person," he said, and Speaker of the House "Nancy Pelosi is a horrible person." Mitt Romney "used religion as a crutch," Trump said, after Romney cited his Mormon faith in his decision to become the only senator in US history to vote to remove a president of his own party. Trump went on and called the investigations into Russian interference in the 2016 elections "bullsh**."

Even his decision to hold up the front page of the Washington Post, displaying the headline "Trump acquitted," struck a sour note, since it reminded the world that he is only the third US president to be impeached -- a process that has sown deep divisions in the country. Let's not forget -- the trial was rigged. His acquittal had been guaranteed by Senate Majority Leader Mitch McConnell before it even began. Boasting about it was akin to former North Korean dictator Kim Jong Il bragging about the 11 holes-in-one he scored in a round of golf.

Like Kim, Trump is not like most people. We would expect any other president in his circumstance to express relief and perhaps a little happiness before promising to heal the nation's wounds.

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