Mar 20, 2014 — The majority leader informed the CIA director that the Senate's chief law enforcement officer would be conducting a "forensic examination" to get answers in the unprecedented dispute.
Mar 11, 2014 — Sen. Dianne Feinstein says some of the CIA's actions could be illegal or unconstitutional, accusing the agency of interfering with the oversight committee she chairs.
Mar 6, 2014 — Did the agency spy on Senate staffers? Did those Senate aides take classified documents from the CIA's headquarters? Investigators are sorting through the accusations.
Mar 7, 2013 — The senator said he "would speak, until I can no longer speak," and he hit that wall early Thursday. His goal was to get the Obama administration to pledge it won't use drone attacks against American citizens on U.S. soil. He's put a bright spotlight on the issue.
Feb 7, 2013 — The Obama administration has relied heavily on its drone program, but prefers not to talk about it. Yet drones and interrogation practices came under scrutiny as CIA nominee John Brennan testified before a Senate committee.
Feb 6, 2013 — The decision to grant lawmakers access to the classified information comes a day before the president's pick to head the CIA has his confirmation hearing. The classified information details the rationale for targeted strikes against U.S. citizens believed to have links to al-Qaida.
Feb 6, 2013 — The Obama administration wanted to keep the existence of the base secret. It has been used to target al-Qaida members in Yemen.
Jan 9, 2013 — Republican senators have said they may try to hold up John Brennan's nomination to be CIA director until they hear more about the attack on the U.S. mission in Benghazi and more about his views on "enhanced interrogation."
Jan 7, 2013 — The president is moving to fill two key posts on his national security team. If confirmed, former Nebraska Sen. Chuck Hagel (a Republican) would lead the Pentagon. John Brennan, the president's counterterrorism adviser, would be at the Central Intelligence Agency.
Jan 7, 2013 — John Brennan is one of the president's top national security aides. A veteran of the CIA, he was the agency's deputy executive director during President George W. Bush's administration. Brennan has said he opposed many of the Bush administration's policies, including the use of waterboarding.