ROLL CALL: Corker Asks Obama for NSA Briefings. “Sen. Bob Corker, R-Tenn., sent a letter to President Barack Obama on Wednesday demanding a briefing from administration officials on the National Security Agency’s domestic surveillance programs. Corker, the top Republican on the Senate Foreign Relations Committee, set a Sept. 13 deadline for the briefing, in the wake of reports that the scope of the NSA’s surveillance of American citizens has been much wider than previously believed.”