This video frame grab provided by Senate Television shows Sen. Rand Paul, Kentucky Republican, speaking on the floor of the Senate on Capitol Hill in Washington on March 6, 2013. Senate Democrats pushed Wednesday for speedy confirmation of John Brennan's nomination to be CIA director but ran into a snag after a Paul began a lengthy speech over the legality of potential drone strikes on U.S. soil. (Associated Press/Senate Television)
**FILE** CIA Director nominee John Brennan testifies Feb. 7, 2013, on Capitol Hill in Washington before the Senate Select Intelligence Committee holding his confirmation hearing. (Associated Press)
**FILE** CIA Director nominee John Brennan testifies Feb. 7, 2013, on Capitol Hill in Washington before the Senate Select Intelligence Committee holding his confirmation hearing. (Associated Press)
** FILE ** Sen. Dianne Feinstein, D-Calif., right, chairman of the Senate Intelligence Committee meets with CIA director nominee John Brennan, left, currently assistant to the President for Homeland Security and Counterterrorism on Capitol Hill in Washington, Thursday, Jan. 31, 2013. (AP Photo/Pablo Martinez Monsivais)
** FILE ** Sen. Dianne Feinstein (right), California Democrat and chairman of the Senate Intelligence Committee, meets with CIA Director-nominee John Brennan (left), currently assistant to the president for homeland security and counterterrorism, on Capitol Hill in Washington on Thursday, Jan. 31, 2013. (AP Photo/Pablo Martinez Monsivais)
**FILE** John Brennan, deputy national security adviser for homeland security and counterterrorism, briefs reporters at the White House in Washington on Oct. 29, 2010. (Associated Press)
**FILE** Homeland Security Adviser John Brennan (right) and White House Chief of Staff Bill Daley accompany President Obama at Andrews Air Force Base, Md., on May 5, 2011, en route to New York City to visit ground zero and meet with first responders and family members of victims of the Sept. 11, 2001, attacks. (Associated Press)
**FILE** Homeland Security Adviser John Brennan (right) and White House Chief of Staff Bill Daley accompany President Obama at Andrews Air Force Base, Md., on May 5, 2011, en route to New York City to visit ground zero and meet with first responders and family members of victims of the Sept. 11, 2001, attacks. (Associated Press)
President Obama and former Nebraska Sen. Chuck Hagel (left), the president's choice for Defense Secretary, listen as White House counterterrorism adviser John Brennan, the president's choice for CIA director, speaks in the East Room of the White House in Washington on Jan. 7, 2013, where the president made the announcement. (Associated Press)
