He is definitely running in 2028

https://www.politico.com/news/2025/03/06/gavin-newsom-breaks-with-democrats-on-trans-athletes-in-sports-00215436

“I think it’s an issue of fairness, I completely agree with you on that. It is an issue of fairness — it’s deeply unfair,” Newsom said in his debut podcast episode of “This is Gavin Newsom.” “I am not wrestling with the fairness issue. I totally agree with you.”

Newsom also agreed that the most politically destructive attack ads from Trump’s campaign featured Kamala Harris’ support for providing taxpayer-funded gender transition-related medical care for detained immigrants and federal prisoners.

”She didn’t even react to it, which was even more devastating,” Newsom said, suggesting upward of 90 percent of Americans disagreed with Harris’ position. “Then you had the video [of Harris] as a validator. Brutal,” Newsom added. “It was a great ad.”

I think he’s 100% aiming for a run here.

https://www.politico.com/news/2025/03/06/gavin-newsom-breaks-with-democrats-on-trans-athletes-in-sports-00215436

“I think it’s an issue of fairness, I completely agree with you on that. It is an issue of fairness — it’s deeply unfair,” Newsom said in his debut podcast episode of “This is Gavin Newsom.” “I am not wrestling with the fairness issue. I totally agree with you.”

Newsom also agreed that the most politically destructive attack ads from Trump’s campaign featured Kamala Harris’ support for providing taxpayer-funded gender transition-related medical care for detained immigrants and federal prisoners.

”She didn’t even react to it, which was even more devastating,” Newsom said, suggesting upward of 90 percent of Americans disagreed with Harris’ position. “Then you had the video [of Harris] as a validator. Brutal,” Newsom added. “It was a great ad.”

I think he’s 100% aiming for a run here.