President Donald Trump has asked the Supreme Court to allow him to fire Federal Reserve board member Lisa Cook, setting up a test of the president’s ability to take control of the powerful interest-rate setting body. The Justice Department on Thursday asked the high court to reverse the decisions of two lower courts that allowed Cook to remain in her position while the broader legal fight is underway. Their decisions enabled Cook to participate in a meeting this week that resulted in a quarter-point reduction in the interest rate. Trump’s incursion on the Federal Reserve is the culmination of his...