As the Senate Select Committee on Intelligence prepares to consider White House national security official John Brennan’s nomination to be the next Director of the Central Intelligence Agency, U.S. Senators Ron Wyden (D-Ore.), Mike Lee (R-Utah), Mark Udall (D-Colo.), Chuck Grassley (R-Iowa), Jeff Merkley (D-Ore.), Susan Collins (R-Maine), Dick Durbin (Ill.), Patrick Leahy (D-Vt.), Tom Udall (D-N.M.), Mark Begich (D-Alaska) and Al Franken (D- Minn.) have sent a letter to President Obama seeking the legal opinions outlining the President’s authority to authorize the killing of American citizens during the course of counterterrorism operations.