Obama to Select John Brennan for CIA Director

According to a senior administration official, President Barack Obama will nominate John Brennan, his chief counterterrorism adviser, to be the next director of the CIA.

Brennan, 57, has served as assistant to the president for counterterrorism and homeland security since 2009. An official announcement of Brennan's nomination for the CIA job is expected to come Monday afternoon. Obama is also expected to nominate former Senator Chuck Hagel to be the next secretary of defense.

Should the Senate confirm Brennan's nomination, he'll replace retired General David Petreaus, who stepped down from his position in November after it was revealed that he had engaged in an extramarital affair with his biographer. Michael Morrell, a career intelligence officer who had been serving as the CIA's deputy director, has been acting director since Petreaus' departure.

Brennan is described as a close adviser to the president who has led efforts to target al Qaeda's leadership. He is also said to have a deep understanding of the CIA after having worked there for decades. A return to the CIA would be a sort of homecoming for Brennan, who spent 25 years there as a Mideast and terrorism expert.