President Trump fired his acting attorney general on Monday after she defiantly refused to defend his immigration executive order, accusing the Democratic holdover of trying to obstruct his agenda for political reasons. The acting attorney general, Sally Q. Yates, on Monday ordered government lawyers not to defend President Trump’s executive order on immigration in court. The president appointed Dana J. Boente, United States attorney for the Eastern District of Virginia, to serve as acting attorney general until Senator Jeff Sessions of Alabama is confirmed.