Key U.S. agencies, including the FBI, State Department and the Pentagon, have instructed their employees not to comply with cost-cutting chief Elon Musk's latest demand that federal workers explain what they accomplished last week — or risk losing their job. The pushback from appointees of President Donald Trump marked a new level of chaos and confusion within the beleaguered federal workforce, just a month after Trump returned to the White House and quickly began fulfilling campaign promises to shrink the government. Administration officials scrambled throughout the weekend to interpret Musk's unusual mandate, which apparently has Trump's backing despite some lawmakers arguing it is illegal.