George Conway, a long-standing critic of Donald Trump, has accused the former president of behaving like Adolf Hitler in his final days following a bizarre attempt to undermine the buzz surrounding Vice President Kamala Harris.

On Sunday, Trump falsely accused his presidential opponent of using artificial intelligence to suggest a huge crowd attended a Wednesday campaign rally near Detroit.

The Harris campaign said 15,000 people were drawn to the rally as excitement builds around her bid for the White House, while Trump bogusly declared “there was nobody there.” The event was widely covered by the media, with local news outlet MLive reporting that “about 15,000 people” were present for the rally.

Trump’s baseless claim led to Conway renewing his attacks on the Republican presidential nominee, going so far as to liken Trump’s mood to Hitler retiring to his Berlin bunker during the last days of World War II.

During an appearance on MSNBC’s “Morning Joe” on Monday, Conway told co-host Jonathan Lemire, “[Trump] is, as I’ve been saying, a narcissistic sociopath, a pathological narcissist and a sociopath as defined by the American Psychiatric Association.”

“These are, historians will tell you, the traits of authoritarian dictators throughout history,” the conservative attorney continued. “And what we’re seeing now is, as you put it, an implosion. This, I believe, is what ultimately was always going to happen. The final implosion of Donald Trump.”

“I mean, it’s like Hitler when Hitler was moving around divisions that didn’t exist in the last 10 days of the war in the Führerbunker,” Conway added. “He has completely lost it. This post is beyond question, delusional.”

Conway recently launched a new political action committee, the Anti-Psychopath PAC.

During last month’s Republican National Convention, Conway’s PAC placed anti-Trump billboards around host city Milwaukee, reminding voters that the GOP was in the process of nominating a “convicted felon.”