“When Trump took control of the California National Guard last June, he relied on 10 USC 12406, a previously obscure statute that authorizes the president to “call into Federal service members and units of the National Guard of any State” in three circumstances: 1) when the United States “is invaded or is in danger of invasion by a foreign nation,” 2) when “there is a rebellion or danger of a rebellion against the authority of the Government of the United States,” or 3) when “the President is unable with the regular forces to execute the laws of the United States.” The government’s lawyers argued that Los Angeles’ protests against the Trump administration’s immigration crackdown created both of the latter two conditions.”