Trump National Guard Los Angeles lawsuit.

A federal judge in San Francisco is weighing whether the Trump administration violated federal law by sending National Guard troops to accompany federal agents on immigration raids in Southern California. A three-day trial on the matter concluded Wednesday. California has argued the troops violated the Posse Comitatus Act. The 1878 law generally prohibits military enforcement of domestic laws. Lawyers for the administration say the law doesn’t apply to the troops deployment to Southern California. They say the troops were called up under an authority that allows their deployment when “the president is unable with the regular forces to execute the laws of the United States.”