California is now formally prepared to initiate immediate legal action if Donald Trump proceeds with sending federal troops into San Francisco. Governor Gavin Newsom has intensified his opposition, issuing a sharply worded warning that frames the issue as not merely political, but constitutional and existential for the state’s sovereignty.

Newsom’s statements underscore a deepening battle between state and federal authority over the use of military forces on American soil.

The backdrop to this showdown is the Trump administration’s recent deployments of the National Guard to cities like Chicago and Portland, Oregon, which sparked protests and triggered multiple legal challenges. Over the weekend, Trump again voiced his intention to target San Francisco, telling Fox News host Maria…