(Reuters) -A U.S. Supreme Court ruling Thursday in a legal battle over President Donald Trump's firing of two federal labor board members contained a line that eased, for now, worries that the cases could open the door for Trump to fire Federal Reserve Chair Jerome Powell at will. The court's order allows Trump to keep the two Democratic labor board members sidelined while they challenge the legality of their removal. Lawyers for Gwynne Wilcox, who was removed from the National Labor Relations Board, and for Cathy Harris, who was dismissed from the Merit Systems Protection Board, had argued that a ruling in favor of the Trump administration could undermine legal protections for Fed policymakers long seen as being insulated from presidential dismissal for reasons other than malfeasance or misconduct.