A growing number of Democrats have concluded that President Joe Biden all but doomed their party's chances of victory when he insisted on running for a second term.

However, one former Biden official recently went rogue in the face of that consensus by lashing out at her former boss' critics. 

Former press secretary says Biden was "engaging" and "understood policy"

According to Breitbart, former White House press secretary Karine Jean-Pierre came to the former president's defense during a Monday appearance on CBS' "The Late Show."

"No one is saying that he didn’t age," Jean-Pierre told host Stephen Colbert. "I’m talking about did he have… the mental acuity, was he able to govern?"

"And the man that I saw nearly every day was someone who was engaging, understood policy, and was always putting the American people first," she asserted.

However, Colbert was quick to push back by referencing Biden's disastrous debate performance against President Donald Trump.

Colbert: Biden "seemed like a dramatically different person"

"It was very personal for those of us who watched [the debate] too, because it was a shock to our system to see that," Colbert declared.

"Because — I mean, you’re talking to a guy who helped raise $25 million for Joe Biden in March of that same year. And three months later, I saw a guy who I had not seen backstage at the benefit that I did," he continued.

"It seemed like a dramatically different person. And at 81 years old, that’s not entirely unexpected. You can imagine why people got so worried," the late-night comedian pointed out.

“I don’t think anybody questioned his heart or his policies. But it takes more than that to be the President of the United States,” Colbert added.

Jean-Pierre decries "really ugly assault" on former president

"And in a moment of great pressure on stage, we saw someone shock us and worry us, and nothing could assuage that worry. So I don’t think it was necessarily a betrayal of Joe Biden as other people saying, ‘We don’t think we were shown the Joe Biden that you saw,'" the host contended.

Nevertheless, Jean-Pierre decried what she called the "really ugly assault on someone who had 50-plus years of experience and who, again, objectively had done a good job as President of the United States."

Breitbart noted how Jean-Pierre's remarks echoed similar comments which she made during an interview with "CBS Mornings," arguing that the former president was mentally sharp and able to lead.