FILE - This Oct. 15, 2013, file photo shows the Supreme Court in Washington the day the court's justices said they would be reviewing whether or not the Environmental Protection Agency overstepped its authority in developing rules aimed at cutting emissions of six heat-trapping gases from factories and power plants. Monday, Feb. 24, 2014, the Court will hear arguments on the unanimous federal appeals court ruling that upheld the government's unprecedented regulations aimed at reducing the gases blamed for global warming. (AP Photo/Susan Walsh, File)
FILE - This Oct. 15, 2013, file photo shows the Supreme Court in Washington the day the court's justices said they would be reviewing whether or not the Environmental Protection Agency overstepped its authority in developing rules aimed at cutting emissions of six heat-trapping gases from factories and power plants. Monday, Feb. 24, 2014, the Court will hear arguments on the unanimous federal appeals court ruling that upheld the government's unprecedented regulations aimed at reducing the gases blamed for global warming. (AP Photo/Susan Walsh, File)
**FILE** State Field State Park Director Clay Phillips talks with Jared Blumenfeld, regional administrator of the Environmental Protection Agency, during a tour of the park just north of the border with Mexico Wednesday, Sept. 21, 2011, in San Diego. (AP Photo/Gregory Bull)
John Stokes, right, director of the Natural Areas Department for the city of Fort Collins, points out the Poudre River to Environmental Protection Agency Administrator Gina McCarthy, left; David Agnew, left rear, director of the White House's intergovernmental affairs office; and Nancy Sutley (in sunglasses, behind McCarthy), chair of the White House Council on Environmental Quality, in Fort Collins, Colo., Tuesday Feb. 11, 2014. (AP Photo/The Coloradoan, V. Richard Haro)
In this Wednesday, Feb. 5, 2014 photo, Didi Fung, a contractor for the Environmental Protection Agency, prepares to collect water samples from the Dan River as state and federal environmental officials continued their investigations of a spill of coal ash into the river in Eden, N.C. Duke Energy estimates that up to 82,000 tons of ash has been released from a break in a 48-inch storm water pipe at the Dan River Power Plant. (AP Photo/Gerry Broome)
New EPA Administrator Gina McCarthy was aware as far back as 2009 that one of her employees claimed to be working for the CIA while still collecting his EPA paycheck, according to the deposition of John C. Beale. (AP Photo/Cliff Owen, File)