Editor's note: Retired Gen. David Petraeus stepped down Friday as head of the Central Intelligence Agency - 14 months after taking the job, days after the presidential election and days before he was to testify before Congress about an attack on a U.S. consulate in Libya that left four Americans dead.

[Updated at 7:59 p.m.] Speaking on CNN's "Erin Burnett OutFront," Rep. Peter King (R-New York) called Petraeus' resignation "a real loss for the country, a real loss for the CIA."

"We're going to lose the best man for the job, but again America is adaptable," said the chairman of the House Homeland Security Committee. "Put it this way, anytime you lose a David Petraeus, the country is not as safe as it could be."
[Updated at 7:11 p.m.] The FBI investigated a tip that the woman Petraeus was involved in an extramarital affair with was Paula Broadwell, who co-wrote a biography about him, a U.S. official said.

Broadwell spent a year with Petraeus in Afghanistan, interviewing him for the book "All In: The Education of General David Petraeus."

CNN has not been been able to reach Broadwell for comment. It is not clear if Broadwell is the woman with whom Petraeus had admitting having an affair, leading to his resignation Friday as the head of the CIA.

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