Several news outlets are reporting that President-elect Donald Trump will nominate Oklahoma Attorney General Scott Pruitt to serve as the Administrator of the U.S. Environmental Protection Agency. Mr. Pruitt has been the Attorney General of Oklahoma since his election to that post in 2011. In his role as Oklahoma Attorney General, Mr. Pruitt has been active in litigation challenging current EPA regulations in court, most significant of which have been challenges to the Obama Administration’s Clean Power Plan.

Mr. Pruitt and Oklahoma are part of the coalition of 28 states challenging EPA’s regulation of greenhouse gas emissions from existing power plants – a key component of the Clean Power Plan – in the case of West Virginia v. EPA, Case No. 15-1363. This case is currently pending in the U.S. Court of Appeals for the D.C. Circuit, which recently heard nearly seven hours of oral arguments and is expected to issue a ruling soon.

Environmental groups have been quick to react to Mr. Pruitt’s apparent nomination. Sierra Club Executive Director, Michael Brune released a statement critical of the pick:

Having Scott Pruitt in charge of the U.S. Environmental Protection Agency is like putting an arsonist in charge of fighting fires…We strongly urge Senators, who are elected to represent and protect the American people, to stand up for families across the nation and oppose this nomination.

Mr. Pruitt’s appointment must be confirmed by the U.S. Senate. Several Democratic Senators have already raised concerns over his nomination, including Senator Brian Schatz (D-HI), who tweeted that he “will do everything I can to stop this.”