The head of the House Intelligence Committee hasn't shared with the FBI a classified memo allegedly detailing political bias around the federal probe into possible ties between the Trump campaign and Russia, despite requests, according to a spokesman for the bureau.

"The FBI has requested to receive a copy of the memo in order to evaluate the information and take appropriate steps if necessary. To date, the request has been declined," Andrew Ames said in a statement.

The Daily Beast first reported the FBI's statement.

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The memo, produced by Chairman Devin Nunes Devin Gerald NunesSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Sunday shows preview: With less than two months to go, race for the White House heats up Sunday shows preview: Republicans gear up for national convention, USPS debate continues in Washington MORE (R-Calif.) and his staff, created buzz last week among the scores of House Republicans who viewed the classified report detailing alleged surveillance abuses.

Many of the GOP lawmakers who viewed the memo said it provided hard evidence senior FBI and Department of Justice officials made politically motivated decisions that ultimately sparked special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's investigation into whether Trump campaign officials colluded with the Kremlin.

"You all need to see it,” said Rep. Jim Jordan (R-Ohio), who called it "alarming." “More importantly, the American public needs to see it. What the FBI did is just as wrong as it can be.”

The Hill has reached out to Nunes's office for comment regarding the FBI's statement.

Both Democrats and Republicans described the document as a top-line summary that is supported by classified documents and interviews. Apart from congressional leaders, lawmakers do not have high enough security clearances to view the other documents.

Democrats, however, questioned whether the underlying highly classified information proves there was political bias within the government.

“I think the whole political purpose of this is to make a misleading case to the public, perpetuate the president’s political narrative, but not let the public see the underlying materials that would show just how distorted it is — I think that’s by design,” said Rep. Adam Schiff (Calif.), the top Democrat on the Intelligence panel.

“The problem is, we can’t point out the inaccuracies without relying on the underlying material,” he added.

Republicans have claimed that the FBI used an unverified dossier linking President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE to Russia as the basis to obtain a politically motivated Foreign Intelligence Surveillance Act warrant to spy on the Trump campaign during the transition, although former bureau officials have stated that such claims suggest a misunderstanding of the law.

Some Republican lawmakers have began publicly blasting Mueller's probe. Trump has attacked the federal investigation as a "witch hunt."

Katie Bo Williams and Jonathan Easley contributed.