“It was sort of a sad and pathetic sight,” Acosta told CNN’s Chief Media Correspondent Brian Stelter on “Reliable Sources” on Sunday. “I’ve never seen him this alone the entire time he was at the level of presidential politics.”

Acosta, now CNN’s lead domestic reporter, said Trump may have had a different outcome at the end had he not instigated a riot that laid siege to the US Capitol on January 6 — one of several attempts in the waning days of his presidency to overturn the election results. After the siege, Trump lost whatever remaining credibility he had with many of his supporters, according to Acosta.

“Essentially what we saw was the undoing of the Trump presidency,” Acosta said of Trump’s final days. “What we saw the President build over the course of four or five years out on the campaign trail and over at the White House just sort of of unraveled at the end.”