In this Jan. 18, 2017, file photo, Environmental Protection Agency Administrator-designate, Oklahoma Attorney General Scott Pruitt testifies on Capitol Hill in Washington at his confirmation hearing before the Senate Environment and Public … Works Committee. On inauguration eve, five law professors filed a brief in support of a 2015 regulation giving EPA and the Army Corps of Engineers discretion to regulate tributaries and wetlands far upstream from navigable lakes and rivers to protect water quality.