California Gov. Gavin Newsom questions Trump's mental and physical ability as their clash over immigration enforcement rages on.

An escalating clash pits a Republican president looking to fulfill his mass deportation goals against a Democratic governor with White House aspirations hoping to mobilize opposition.

California Republicans have found ways to convince Trump he’s helping the state rather than Newsom before, one expert said.

Gavin Newsom won praise on Wednesday for his speech Tuesday night seen by a national audience, something many Democrats saw as a shot across the bow to President Donald Trump that they can fight Trump -- and one that sparked new talk of Newsom as the party's standard-bearer in 2028.

The governor bragged about working with ICE in California but said that President Trump was “trying to gin things up to create problems” at protests.

Trump lawyers told the court that Trump has "no obligation" to consult, or even notify California Gov. Newsom before federalizing National Guard troops to quell anti-ICE protests.

CNN chief data analyst Harry Enten on Wednesday broke down why Gov. Gavin Newsom (D-CA) is opposing President Donald Trump and what it means for his potential 2028 presidential campaign. "84% of Democrats nationwide say they want Democrats to take on Donald Trump.

Elected officials, as well as social media influencers, had wide-ranging opinions of the governor’s prime time address warning that democracy is in danger.

I predict that the Democrats' next nominee is someone not yet on people's radars, and that would be the best possible outcome for them.