Updated

The former deputy director of the CIA insisted on Wednesday that he didn't edit the widely debunked talking points on the 2012 Benghazi attack due to political pressure to protect President Barack Obama and onetime Secretary of State Hillary Rodham Clinton.

In a rare open session, Mike Morell offered a lengthy defense of his actions and the work of the spy agency in the politically-charged aftermath of the Sept. 11 assault on the diplomatic mission in Libya. Four Americans, including U.S. Ambassador Chris Stevens, were killed in two separate terror attacks over a chaotic period of several hours.

Morell deleted references to al-Qaida in versions of the talking points that were used by Susan Rice, then U.S. ambassador to the United Nations, in a series of Sunday talk show appearances. Republicans have accused the Obama administration of trying to mislead the American people about an act of terrorism in the heat of the presidential campaign.

In his testimony, Morell said he was deeply troubled by allegations made by lawmakers and some in the media "that I inappropriately altered and influenced CIA's classified analysis and its unclassified talking points about what happened in Benghazi, Libya in September 2012 and that I covered up those actions."

"These allegations accuse me of taking these actions for the political benefit of President Obama and then Secretary of State Clinton. These allegations are false," Morell said.

He said he and the agency could have done a better job, but he dismissed suggestions that the CIA "cooked the books" in the assessment of the attack.

The intelligence community's talking points, compiled for members of Congress, suggested the Sept. 11 attack stemmed from protests in Cairo and elsewhere over an anti-Islamic video rather than an assault by extremists. Five days after the attack, Rice relied on the talking points.

Rice described the attack as a "horrific incident where some mob was hijacked, ultimately, by a handful of extremists."

Rep. Mike Rogers, R-Mich., the chairman of the committee, said the White House used the talking points "to perpetuate its own misguided political agenda."

"The White House wants to ignore reality and perpetuate the fallacy that al-Qaida and other Islamic extremists are on the verge of defeat," Rogers said.

A year and a half after the assault, multiple congressional committees have investigated and reported on the attacks, largely faulting the State Department for a lack of security at the diplomatic mission.