Federal immigration agents were greeted by protests in the Bay Area en route to a government-owned artificial island that houses a U.S. Coast Guard base.

U.S. President Donald Trump will not deploy federal agents to San Francisco, the California city's mayor said on Thursday, citing a call with the Republican leader.

California Gov. Gavin Newsom said Wednesday he was prepared to sue the Trump administration in a “nanosecond” if the White House moved forward with the deployment of the National Guard to San Francisco. “Send troops to San Francisco and we will sue you,@realDonaldTrump,” Newsom wrote plainly in a post on X.

The San Francisco district attorney said in an interview that she came up with the strategy after seeing federal agents repeatedly roughing up people in Los Angeles and Chicago.

Trump has claimed “unquestioned power” and indicated he could justify deploying federal troops to San Francisco under the Insurrection Act, an 1807 law that gives the federal government authority to suppress a rebellion or civil unrest.