FILE - In this Sept. 8, 2011, file photo Sen. Dean Heller, R-Nev., speaks during a news conference, called to demand that the Joint Select Committee on Deficit Reduction open the entirety of its proceedings to the public, on Capitol Hill in Washington. Republicans? clear shot at winning control of the Senate is attracting tens of millions of dollars from GOP-allied outside groups eager to spend on a surer bet than the White House race. Control of the U.S. Senate will hinge on some tight races, including the Nevada race, seen by Democrats as one of their best chances of unseating one of the newest Republican senators, Heller. (AP Photo/Manuel Balce Ceneta, File)