Elon Musk, the billionaire head of the Trump administration's Department of Government Efficiency, threatened on Saturday to fire any federal worker who fails to explain what work they have accomplished during the previous week.

A group of five labor unions had argued that President Trump's effort to shrink the size of the federal workforce were illegal.

A federal judge in Maryland on Friday temporarily blocked President Donald Trump from implementing bans on diversity, equity and inclusion programs at federal agencies and businesses that contract with the federal government.