In this June 4, 2013 file photo, Sen. Richard Burr, R-N.C. speaks during a news conference on Capitol Hill in Washington.
In this June 4, 2013 file photo, Sen. Richard Burr, R-N.C. speaks during a news conference on Capitol Hill in Washington. J. Scott Applewhite AP
In this June 4, 2013 file photo, Sen. Richard Burr, R-N.C. speaks during a news conference on Capitol Hill in Washington. J. Scott Applewhite AP