A federal judge early Saturday blocked Elon Musk’s Department of Government Efficiency from accessing Treasury Department records that contain sensitive personal data such as Social Security and bank account numbers for millions of Americans.

The billionaire and his cronies continue to move fast and break things. Here are their boldest attacks thus far.

Nineteen attorneys general, including New York’s Letitia James, accused the president of failing to faithfully execute the nation’s laws when he let Mr. Musk comb through federal computer systems.