While this is n executive decision, the EPA is still subject to legislative influence by those that hold the power of the purse. There are currently 18 members of the U.S. Senate Committee on the Environment and Public Works.

Barbara Boxer - California

Max Baucus - Montana

Tom Carper - Delaware

Frank Lautenberg - New Jersey

Ben Cardin - Maryland

Bernie Sanders - Vermont

Sheldon Whitehouse - Rhode Island

Tom Udall - New Mexico

Jeff Merkley - Oregon

Kirsten Gillibrand - New York

James Inhofe - Oklahoma

David Vitter - Louisiana

John Barrasso - Wyoming

Jeff Sessions - Alabama

Mike Crapo - Idaho

Lamar Alexander - Tennessee

Mike Johanns - Nebraska

John Boozman - Arkansas

According to http://epw.senate.gov/public/index.cfm?FuseAction=Members.Ho...