CIA Director Petraeus resigns over extramarital affair
"Dave's decision to step down represents the loss of one of our nation's most respected public servants," Clapper said in a statement without giving a reason for the resignation.
White House spokesman Jay Carney did not provide any details but said: "We'll have something from the president on it today."
Petraeus said in a message to the CIA workforce that he was resigning because of an extramarital affair.
"After being married for over 37 years, I showed extremely poor judgment by engaging in an extramarital affair. Such behavior is unacceptable, both as a husband and as the leader of an organization such as ours," Petraeus said.