Wilcox's lawsuit, which was filed in U.S. District Court for the District of Columbia, asserts that her dismissal was a "blatant violation" of the National Labor Relations Act that protects board members from being fired by the president without cause.

Gwynne Wilcox, the former chair of the nation's top labor watchdog, the National Labor Relations Board, was fired by President Trump last week. It's the first time a board member has been removed from the agency in its nearly 90-year history.