In a major win for President Donald Trump, the U.S. Supreme Court on Tuesday blocked a lower court order that would have forced his administration to rehire over 16,000 federal employees across six government agencies. The brief, unsigned decision gives Trump the green light to move forward with his plan to reduce the federal workforce, a key element of his effort to streamline Washington. The high court’s ruling halts a March 13 injunction issued by U.S. District Judge William Alsup in California. That order had directed the Trump administration to reinstate probationary employees at the Departments of Defense, Veterans Affairs,...