President Obama is campaigning as a champion of the oil and gas boom he’s had nothing to do with, and even as his regulators try to stifle it. The latest example is the Interior Department’s little-noticed August decision to close off from drilling nearly half of the 23.5 million acre National Petroleum Reserve in Alaska.

The area is called the National Petroleum Reserve because in 1976 Congress designated it as a strategic oil and natural gas stockpile to meet the “energy needs of the nation.” Alaska favors exploration in nearly the entire reserve. The feds had been reviewing four potential development plans, and the state of Alaska had strongly objected to the most restrictive of the four. Sure enough, that was the plan Interior chose. […]

The problem is almost no one in the energy industry and few in Alaska agree with him. In an August 22 letter to Mr. Salazar, the entire Alaska delegation in Congress—Senators Mark Begich and Lisa Murkowski and Representative Don Young—call it “the largest wholesale land withdrawal and blocking of access to an energy resource by the federal government in decades.” This decision, they add, “will cause serious harm to the economy and energy security of the United States, as well as to the state of Alaska.” Mr. Begich is a Democrat.