Open this photo in gallery: Elon Musk, left, receives a chainsaw from Argentina's President Javier Milei, right, at the Conservative Political Action Conference at the Gaylord National Resort & Convention Center, Feb. 20 in Oxon Hill, Md.Jose Luis Magana/The Associated Press More than 20 civil service employees resigned Tuesday from billionaire Trump adviser Elon Musk’s Department of Government Efficiency, saying they were refusing to use their technical expertise to “dismantle critical public services.” “We swore to serve the American people and uphold our oath to the Constitution across presidential administrations,” the 21 staffers wrote in a joint resignation letter, a…