Judge Chrales Breyer ruled that President Donald Trump has violated the Posse Comitatus Act when he deployed troops to Los Angeles to conduct law enforcement operations, but did he? Here's what it ...

The Posse Comitatus Act is a nearly 150-year-old federal law that limits the U.S. military’s role in enforcing domestic laws. At its core, experts say the law reflects America’s long-standing belief ...

A U.S. law dating to the days of Reconstruction following the Civil War is at the center of a controversy over whether President Donald Trump can send active-duty Marines into Los Angeles to help ...

The act is now being used to challenge actions by President Donald J. Trump, who has sent federal troops into U.S. cities, and plans to enlarge the scope of the National Guard with respect to crime in ...

[This post is co-authored with Professor Seth Barrett Tillman.] The Supreme Court's decision in Trump v. Illinois (2025) was issued in a preliminary context, and without the benefit of oral argument.

California’s fight to rein in President Trump’s deployment of troops to Los Angeles hinges on a 19th century law with a a blood-soaked origin and a name that seems pulled from a spaghetti western film ...

The text of the Posse Comitatus Act itself is slight, its relevant section barely more than 60 words. California's fight to rein in President Trump's deployment of troops to Los Angeles hinges on a ...