Global heavyweight Amazon has joined the crusade to rein in the National Labor Relations Board—asserting its structure limits disputes to hearings before administrative law judges and thus violates companies’ due process right to judicial review in court.

Seattle-based Amazon sued the NLRB last Thursday in federal court in San Antonio, Texas. The 22-page complaint, filed by Amber Rogers and Kurt Larkin of Hunton Andrews Kurth in Dallas, contends the agency’s structure unconstitutionally insulates board members and administrative law judges from removal of office by the president, calling it a “constitutional infirmity.”