Senators John Barrasso (R-WY), Roy Blunt (R-MO), John Boozman (R-AR), Jim Inhofe (R-OK), Jeff Sessions (R-AL), David Vitter (R-LA), and Roger Wicker (R-MS) expressed concerns about a recent Obama administration decision to alter the social cost of carbon in a June 18 letter to Environmental Protection Agency Acting Administrator Bob Perciasepe, Agency Administrator Nominee Gina McCarthy, Secretary of Energy Ernest Moniz, and Office of Management and Budget Director Sylvia Burwell. They said the higher the estimate of the social cost of carbon, the more benefits can be linked to environmental regulations. The Senators urged the agencies to provide more information on the changes by July 2.