Did the Obama administration tinker with an obscure White House estimate to make its sweeping environmental agenda seem less costly?

“Connecting the dots, it’s clear the administration updated the social cost of carbon, without much notice, in order to justify sprawling new regulations,” said California Republican Rep. Duncan Hunter. “And not long after, the president pulls back the curtain on a new agenda that will lean heavily on rule making, and now there’s a clear line of sight into the administration’s plans.”

President Barack Obama unveiled his plan to address global warming late last month, but about three weeks before the announcement, the White House quietly released an update on its estimates for the social cost of carbon – buried in a rule regarding microwave ovens.