Former Vice President Kamala Harris expressed regret over not challenging President Joe Biden's decision to run for reelection. In an interview on ABC's "Good Morning America" on Tuesday, she described her inaction as "reckless."

During the conversation with co-anchor Michael Strahan, Harris acknowledged her hesitation to voice her concerns. She stated, "Do you regret not voicing your opinion in that moment?" to which she replied, "Yes, and I, and I actually have reflected on that, and I've written about that."

Strahan further questioned whether her input would have made a difference. Harris responded, "I don't know, but I can only take responsibility for myself and on reflection, you know, and I talk about it in the context of asking a question of myself, 'was that grace to not bring it up to him, or was it reckless?'

She elaborated on her feelings, saying, "And on my part, I do reflect on that and feel that it was -- it was a recklessness about not raising it with him." Harris admitted that she feared her concerns might be perceived as "self-serving."

"I talk about what was going through my head, right? And what was going through my head to not bring it up was that it would come off as being very self-serving, and therefore maybe lack the credibility that it deserved. But I do think about it. I do think about it," she said.

Harris emphasized that her concerns regarding Biden's reelection were separate from her respect for his ability to serve as president. "My concern about him running for reelection was completely separate from my admiration and knowledge about his capacity to serve as president of the United States, which was consistent and never wavered," she added.

This discussion comes as Harris's memoir, "107 Days," is released, where she reflects on her experiences and decisions during her time in office. The story is still developing, and updates may follow.