Democrats, on the other hand, say the four-page document is misleading and part of an effort to undermine the bureau and Justice Department special counsel Robert Mueller. His office is investigating possible coordination between the Trump campaign and Russia's attack on the 2016 election.
The intelligence committee voted along party lines on Monday to release the memo to the public. The White House says it's currently reviewing the document, and the president said last night said that the chances of it being released are "100 percent."
For now, the memo remains classified. Lawmakers who have read it say it alleges the FBI and Justice Department gave scurrilous or incomplete evidence to the Foreign Intelligence Surveillance Court in order to surveil people in the Trump camp.
In its statement, the FBI says it "takes seriously" its obligations to the FISA court that approves surveillance for foreign intelligence purposes. The bureau says it is "committed to working with the appropriate oversight entities to ensure the continuing integrity of the FISA process."
The FBI's response also followed accusations by a Democrat on the intelligence committee that Nunes, a close Trump ally and member of the president's transition team, of working with the White House to prepare and now release the memo.
On CNN Wednesday, Rep. Mike Quigley, D-Ill., relayed a conversation he said he had with Nunes during a committee meeting.
"I asked the chairman, 'Did he work with'" the Trump administration, "and I asked all the preliminaries-- coordinate, discuss—and he said, 'not to my knowledge,'" Quigley said. "And I asked him, 'Did your staff?' And then he became quite agitated and he said, 'I'm not answering that.'"
Quigley said there was a precedent for questioning Nunes' contacts with the White House. He pointed to what he called the Republican chairman's "midnight ride" to the White House in March to receive classified documents from the administration alleging improper "unmasking" of Trump associates in intelligence reports.
"I fully believe that Chairman Nunes has not changed his tactics. He began this investigation as a subsidiary of the White House, as someone who was coordinating with them rather than being an independent investigator," Quigley said. "The sad part is he is the chairman of the committee that is investigating the most important attack on our country's democracy in our lifetime."
Nunes' office did not immediately respond to a request for comment.
As Democrats raised questions about a possible White House role in crafting the memo, White House chief of staff John Kelly said he expected the memo to be made public soon.
"It will be released here pretty quick, I think, and then the whole world can see it," Kelly told Fox News Radio on Wednesday.
Although the White House's preference for making the memo public is clear, it remains unclear, at this point, exactly how the document would be released.
A senior Republican on the intelligence committee, Rep. Michael Conaway of Texas, told NPR that the memo would be published in the Congressional Record.
"As I understand the mechanics, the way we actually release is that we insert it in the Congressional Record. The House has to be in session to do that," he said.