Members of Congress want to know who helped create the Obama administration's "talking points" on the deadly attacks on the U.S. Consulate in Benghazi, Libya on Sept. 11.
The inquiry comes after hearings on Capitol Hill revealed the CIA concluded early on that terrorists were to blame for the deadly 9/11 assault.
Lawmakers now want to know who took that critical information out of the White House's early statements about the attack.
The answer could explain why U.N. Ambassador Susan Rice kept describing the incident as a spontaneous protest that was sparked by an anti-Islam video.
Democrats said the CIA signed off on the final talking points.
Republicans question whether the White House was trying to cover it up, fearing it would cause voters to question the president's claim that the United States had hurt al Qaeda's power.
"She would have sat down with the National Security Council, and she would have known that those talking points had been watered down, and she could have caveated that in her statement, which she didn't," Rep. Peter King, R-N.Y. told ABC's "This Week."
"She left a clear impression that this was a spontaneous demonstration based on the video," he continued. "And as President Obama said, 'Don't blame Susan Rice because she had nothing to do with Benghazi,' then why do they send her out as the representative to the American people?"
But Sen. Lindsey Grahan, R-S.C., said the lion's share of the blame rested with the president.
"I blame the president more than anybody else," Lindsey told NBC's "Meet the Press." "Susan Rice is a bit player here."
"Was he informed of the June attack on our consulate where they blew a hole where 40 people could go through?" he pressed. "Was he aware of the Aug. 15 cable where Stevens was saying, 'We can't withstand a coordinated al Qaeda attack. There are 10 militia groups all over Benghazi?'"
"I blame the president for making this a death trap," Lindsey charged.
Sen. Dianne Feinstein, D-Calif., head of the Senate Intelligence Committee, said she doesn't believe the White House altered the document for political reasons.