U.S. President Donald Trump has fired two Democratic officials at the National Labor Relations Board, a major shakeup that will bring hundreds of cases accusing companies of unlawful labor practices to a standstill and paves the way for Republican control of the agency.

The removal of the National Labor Relations Board’s general counsel had been expected. But the firing of a Democratic member stops it from protecting workers’ rights, for now.

U.S. President Donald Trump has fired at least two Democratic members of the Equal Employment Opportunity Commission, which enforces federal laws banning workplace discrimination, in an unprecedented move likely to spur legal challenges.