(CNN) -- Former CIA Director David Petraeus has not been following the media firestorm that erupted in the wake of his resignation last week after admitting to having had an affair, a former aide said Wednesday.
"He wants to maintain a distance and focus on his family at this time," said retired Col. Peter Mansoor, who added that he had spoken earlier in the day with Petraeus. "He realizes it was a severe and morally reprehensible action, but he violated no laws," Mansoor said.
The affair between the married former military man and his married biographer, Paula Broadwell, ended about four months ago, Mansoor said, though the two remained in contact afterward. "Mostly in a professional capacity, where she's still trying to get her dissertation done and he was still trying to help her with that," he said.
Asked how Petraeus, 60, was holding up, Mansoor said, "He describes it as putting one foot in front of the other, and then repeating the process. So it's going to be a long, long road of healing for them. He understands that and he's focusing on it."
Mansoor's remarks came hours after President Barack Obama declined Wednesday to join congressional voices calling for an investigation into why the FBI did not notify the White House and other political leaders sooner about the investigation into the affair that led to Petraeus' resignation.
"I am withholding judgment with respect to how the entire process surrounding Gen. Petraeus came up," Obama told reporters at the White House. "We don't have all the information yet, but I want to say I have a lot of confidence generally in the FBI. So I'm going to wait and see."
Obama said he agreed with Petraeus' decision to resign after acknowledging an affair, but praised his service to the country.
"From my perspective, at least, he has provided this country an extraordinary service," Obama said.
He also said he had seen no evidence of any potentially damaging breach in national security stemming from the affair.
"I have no evidence at this point from what I've seen that classified information was disclosed that in any way would have had a negative impact on our national security," Obama said.
In Congress, lawmakers from both parties have complained about not having been notified sooner of the investigation that led to the resignation or about potential security breaches.
Sen. Lindsey Graham, R-South Carolina, said he was increasingly concerned about the potential fallout from the affair and any national security implications, including possible links to the September 11 attack on the U.S. Consulate in Benghazi, Libya, that killed four Americans.
Graham has called for a special select committee to investigate the attack.
FBI Director Robert Mueller joined Deputy Director Sean Joyce and acting CIA Director Mike Morell in briefing the lawmakers.
Senate Intelligence Committee Chairwoman Dianne Feinstein, D-California, said Tuesday that she had "many questions about the nature of the FBI investigation, how it was instituted."
"And we'll be asking those questions," she said.
But the committee's ranking Republican member, Sen. Saxby Chambliss of Georgia, said Wednesday the group would not look into questions about the FBI investigation and how congressional leaders learned about it until after the bureau concludes its work.
Petraeus has been scheduled to testify this week in private hearings on Capitol Hill about the Benghazi attack. Some Republicans have criticized the administration's response to the attack and have speculated that the timing of Petraeus' departure may have been linked to the congressional inquiry.
But Petraeus offered Wednesday through his chief of staff to testify on Benghazi, Mansoor said. "He did not like the conspiracies going around that somehow he had something to hide on Benghazi," he said. "I think his offer to testify crossed with the Congress' request to him to testify. But anyway, he looks forward to that."
Petraeus will testify before the House Intelligence Committee on Friday, a senior aide said. Feinstein said Tuesday that she hoped Petraeus would address her Senate panel as early as Friday.
Secretary of Defense Leon Panetta on Wednesday defended his request to withhold the nomination of Gen. John Allen to NATO commander pending an investigation into his contacts with Jill Kelley, whose complaints about anonymous, harassing e-mails led to the discovery of the affair between Petraeus, 60, and Broadwell, 40.
Broadwell's government security clearance has been suspended pending the outcome of investigations, two U.S. officials with direct knowledge of the move told CNN Wednesday.
Defense officials announced Tuesday that the FBI had referred information to them indicating Allen may have exchanged potentially inappropriate e-mails with Kelley, who was a volunteer at MacDill Air Force Base.
Kelley's access to MacDill without an escort has been suspended, a Defense Department official said Wednesday.
She had been given access to the base because of her position as a booster and promoter of programs to help U.S. troops, the official said.
A U.S. official familiar with the e-mails Allen sent to Kelley described them as warranting the investigation.
"If they got out, John Allen would be very embarrassed by them," said the official, who added that there was no evidence of physical contact between the two.
The official said that the e-mails under investigation are from Allen.
But a senior official close to Allen told CNN on Tuesday that the e-mails contained nothing pointing to sex or anything of a romantic nature. Allen may have said, informally, "thanks sweetheart" in an e-mail, the official close to Allen said.
"Anyone who knows him knows his style; he has a habit of replying to every single e-mail (he is sent). Kelley would e-mail his business and personal accounts," the official said.
It will be up to the Defense Department's inspector general to decide if the e-mails' content represents conduct unbecoming an officer, said a third source, a senior U.S. official.
Allen has yet to be questioned by Defense Department inspector general staff, but that could be completed in days, a U.S. official with knowledge of the investigation said.
Allen, who was once stationed at the base, has denied wrongdoing, a senior defense official said. In a statement, Col. John Baker, the chief defense counsel of the Marine Corps, said Allen "fully intends to cooperate" with the inspector general's investigators.
Broadwell's anonymous e-mail to Allen was sent after May, perhaps in June, the official said.
The e-mail, which had also been sent to a number of other officers, bore the handle "kelleypatrol -- or something similar," the official said.
He described the e-mail as "a warning that Kelley was a seductress or something along those lines" and said it was vaguely threatening, but above all weird.
"Allen did not know it was (from) Broadwell," the official said.
The official also said it was unclear when Kelley went to the FBI or whether Allen's warning to her was the trigger, but that Allen saw nothing in the e-mail's wording to warrant referral by him to the FBI.
Kelley's version differs from one offered by the senior official close to Allen, who said it was Allen who received an anonymous e-mail about Kelley, and tipped her off that someone was threatening her.
One of the sources familiar with Kelley said she first mentioned the alleged harassment in a casual conversation with an FBI agent whom she knew socially. She did not seek him out for action on the matter, but he was happy to help, the source said. The source added that Kelley did not know at first that the e-mails led to Petraeus.
A source familiar with Kelley's version of events said the anonymous e-mails traced to Broadwell began in June. It wasn't until two months later that the FBI told Kelley who had sent the e-mails, said the source, adding that Kelley does not know Broadwell.
The general counsel for the Federal Law Enforcement Officers Association identified Frederick Humphries as the agent initially contacted by Kelley about the anonymous e-mails.
The counsel, Lawrence Berger, said Humphries and his wife had been friends for years with Kelley and her husband.
Berger said Humphries took Kelley's concerns over the e-mails to the "appropriate components" at the FBI to investigate. "He reported it to the proper channels and had no further part on the case."
Kelley, 37, and her husband have released a statement saying they have been friends with Petraeus and his family for more than five years and asked for privacy.
A source close to Kelley said Wednesday that Kelley said she had not had a sexual relationship with Petraeus or Allen.
In mid-May, Allen got the first anonymous e-mail from someone using the handle "Kelleypatrol" that maligned Kelley and warned him to be wary of her, the source said.
Allen forwarded it to Kelley, thinking she might have sent it as a joke, but she told him she had not, the source continued.
The move to delay Allen's nomination was "a prudent measure until we can determine what the facts are, and we will," Panetta told reporters Wednesday. "No one should leap to any conclusions."
He said Allen "certainly has my continued confidence to lead our forces," a view shared by Obama, White House spokesman Jay Carney said.
That Allen remains in command in Afghanistan suggests that there is no criminal issue, a U.S. official told CNN. But the official said the Defense Department's inspector general could still find evidence of criminal conduct.
Kelley has not responded publicly to the latest news.
Both Allen and Petraeus appear to know Kelley's sister, Natalie Khawam. The men wrote letters in support of the sister in a custody battle, court records show.
On Monday, FBI agents were at Broadwell's home in Charlotte, North Carolina, according to spokeswoman Shelley Lynch. She declined to say what the agents were doing there.
A senior law enforcement official close to the Broadwell investigation said Wednesday night that it appeared unlikely she would be prosecuted for any unauthorized release of classified information.
The official told CNN National Security Contributor Fran Townsend that investigators were reviewing materials taken Monday from Broadwell's home, but that the information in question did not appear to be substantial; there may have been a technical violation but, if so, it was not egregious.
Broadwell had previously turned over a computer to investigators.
The official said Broadwell agreed to the search of her home but that officials also had secured a search warrant.
The official stressed the decision whether to prosecute rests with the Justice Department.
A source told CNN that Broadwell was acting as Petraeus' archivist and that the FBI had gone to her house to look for any documents she might have.
As a commissioned officer in the military reserves, Broadwell would have had "secret" or "top secret" security clearance, military officials said.
Access to information would have depended on what she needed to know to carry out an assigned task, said the officials, who would not go on the record about an ongoing investigation.
Broadwell has said that she was working on a second book about Petraeus. Her LinkedIn profile lists her as "Archivist/Biographer for General (Retired) David Petreaus." Her first book, "All In," was about Petraeus' leadership.
Broadwell has spoken about how she had to deal with sensitive information in the course of researching the first book.
"I had to follow very clear lines of non-disclosure and sign non-disclosure agreements, like my colleagues. I felt like I was almost held to a higher level of accountability because I could lose my clearance," Broadwell said in a speech last year. "I think it was important to inform my writing, but I knew there was a clear line that I couldn't cross when I was writing it out."
Petraeus has said he never shared classified information with Broadwell, said retired military officer John Nagl, who cited conversations in recent days with Petraeus.
Broadwell, a military intelligence reservist, is assigned to West Point, the Army's military academy, according to her service record, which lists her assignment as "United States Military Academy Staff & Faculty." In August, she was promoted to lieutenant colonel.
Last month, during a speech at the University of Denver, Broadwell suggested the Sept. 11 attackers in Libya were targeting a secret prison at the Benghazi consulate annex, raising unverified concerns about possible security leaks.
"I don't know if a lot of you have heard this, but the CIA annex had actually taken a couple of Libyan militia members prisoner and they think that the attack on the consulate was an effort to get these prisoners back," she said.
A senior intelligence official said no prisoners had been held at the annex. Broadwell did not provide a source for her information, and no evidence has emerged that it came from Petraeus.
Administration officials have said the Benghazi assault was a terrorist attack.
CNN's Jessica Yellin, Nick Paton Walsh, Joe Johns, Gloria Borger, Barbara Starr, Suzanne Kelly, Carol Cratty, Candy Crowley, Dana Bash, Pam Benson and Ted Barrett contributed to this report.