President Donald Trump asked the Supreme Court to allow him to fire Federal Trade Commission commissioner Rebecca Slaughter, who had been reinstated to that post after he had terminated her. Trump in March removed two Democratic commissioners from their posts at the FTC — Slaughter and Alvaro Bedoya — as part of his sprawling effort to exert his influence over federal agencies.The question of “cause” for termination is also at the crux of Trump’s bid to remove Federal Reserve Board Governor Lisa Cook from her role. President Donald Trump on Thursday asked the Supreme Court to allow him to fire...