Petraeus said in a statement that he had shown "extremely poor judgment" in having an affair.

WASHINGTON — David Petraeus has resigned as director of the CIA after admitting he had an extramarital affair.

According to his letter of resignation, Petraeus asked President Obama on Thursday to allow him to resign, and on Friday the president accepted.

Petraeus said in a statement that he had shown “extremely poor judgment” in having an affair.