Rudy Giuliani said Friday that the White House wants to know about details shared during a classified briefing for lawmakers this week on the origin of the FBI's Russia probe, and may use the info to justify trying to shut down the special counsel investigation.

Giuliani, a member of President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's personal legal team, told The Associated Press that the White House wants a readout of the information presented to lawmakers, particularly on the FBI's use of Stefan Halper, an informant who reportedly contacted several advisers to Trump's campaign during the 2016 election.

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Trump and his allies have made unproven claims this week that the informant was used to "spy" on his campaign for political purposes.

“If the spying was inappropriate, that means we may have an entirely illegitimate investigation,” Giuliani told the AP.

“Coupled with Comey’s illegally leaked memos, this means the whole thing was a mistake and should never have happened,” Giuliani continued. “We’d urge the Justice Department to re-evaluate, to acknowledge they made a mistake. It’s a waste of $20 million of the taxpayers’ money. The whole thing is already a waste of money.”