Ilya Somin analyzes a recent Ninth U.S. Circuit Court of Appeals ruling holding that the Trump administration illegally federalized the national guard in Los Angeles. In rejecting the Trump administration’s arguments, the court held, among other grounds, that if Congress has not exercised the authority to take control of a state’s militia, then, Somin writes, “states retain total control over their militia (of which the National Guard is the principal modern example), and that control is protected by the Tenth Amendment. Indeed, such control over state military forces is a central element of state sovereignty.” Read more here.