Trump's move to send the California National Guard to Los Angeles has sharply escalated tensions between the government and the Golden State.

A CNN legal expert shed insight into a lawsuit filed by California officials against President Donald Trump on Monday over his decision to federalize and deploy the California National Guard to Los Angeles,

California leaders said yesterday that they would file a lawsuit against President Trump for deploying National Guard troops to Los Angeles as part of a crackdown on immigration. The lawsuit will argue that Trump’s order to the National Guard was illegal because he bypassed the governor of California, Gavin Newsom.

Having states sue the federal government isn’t the most elegant check and balance, but it’s clearly in keeping with the system our founders established.

Massachusetts AG Campbell joins a lawsuit against the Trump Administration's revocation of state emissions waivers.

A lawsuit filed against the Trump administration this week in San Diego federal court alleges the administration illegally shut down asylum processing at ports of entry along the U.S.-Mexico border.

US President Donald Trump has signed several resolutions passed by Congress into law – including a measure to block California’s plans to ban the sale of new

California is taking the Trump administration to court again, this time over the administration's blocking of the state's 2035 ban on the sale of new gas powered cars.