Democrats blasted Mr. Trump for removing Ms. Yates, insisting that she was upholding the law. “Donald Trump can try to silence heroic patriots like Sally Yates who dare to speak truth to power about his illegal anti-Muslim ban that emboldens terrorists around the globe. But he cannot silence the growing voices of an American people now wide awake to his tyrannical presidency,” said Zac Petkanas, senior adviser to the Democratic National Committee. “The Attorney General should be loyal and pledge fidelity to the law, not the White House. The fact that this administration doesn’t understand that is chilling,” Senate Minority Leader Charles E. Schumer, New York Democrat, said. In her place, Mr. Trump named Dana Boente, a federal prosecutor, as acting attorney general.