In the latest rebuke of the Obama administration’s expansive view of executive power, a federal judge has struck down the Interior Department’s effort to regulate fracking for oil and natural gas. Judge Scott Skavdahl of the District Court of Wyoming already had put a hold on the regulations last year, and in a decision released late Tuesday, he ruled that Congress did not give Interior the power to regulate hydraulic fracturing, indeed it had expressly withheld that power with some narrow exceptions.