Oracle America Inc. on Wednesday sued the U.S. Labor Department in Washington federal court, urging a judge to curtail the power of an agency enforcer to investigate and prosecute workplace bias claims as the technology company wages a long and bitter fight to thwart Obama-era allegations of workplace bias.

The complaint, filed by a team from Orrick, Herrington & Sutcliffe, raised a constitutional challenge to the Labor Department’s Office of Federal Contract Compliance Programs, or OFCCP, the component that investigates and can punish contractors found in violation of federal anti-discrimination protections. The compliance office in January 2017 sued Oracle for alleged pay bias, and that case is pending at the Labor Department.