The FBI has told Sens. Lindsey Graham Lindsey Olin GrahamThe Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Senate Democrats' campaign arm announces seven-figure investment to boost Graham challenger Graham: Comey to testify about FBI's Russia probe, Mueller declined invitation MORE (R-S.C.) and Sheldon Whitehouse Sheldon WhitehouseLWCF modernization: Restoring the promise Restaurant owner defends calamari as 'bipartisan' after Democratic convention appearance Warren calls on McConnell to bring Senate back to address Postal Service MORE (D-R.I.) that it will brief them in response to their demand for any surveillance warrant applications for President Trump, Graham said Wednesday.

“We were informed by the FBI just a few minutes ago that they would be responding to our letter with a classified briefing to the chair and ranking member,” Graham said at the outset of a Senate hearing on Russian interference in elections worldwide.

He provided no specific date for the briefing. FBI Director James Comey is on the Hill Wednesday to brief the chairman and ranking member of the full Judiciary Committee, Sens. Chuck Grassley Charles (Chuck) Ernest GrassleySenate Republicans signal openness to working with Biden Senators offer disaster tax relief bill Trump spikes political football with return of Big Ten season MORE (R-Iowa) and Dianne Feinstein Dianne Emiel FeinsteinSenators offer disaster tax relief bill Democrats back away from quick reversal of Trump tax cuts Congress must save the Postal Service from collapse — our economy depends on it MORE (D-Calif.), respectively.

ADVERTISEMENT

Graham and Whitehouse, who head the subcommittee that has oversight over the FBI, last week sent a letter to Comey and acting deputy attorney general Dana Boente, asking for any warrant application or court documents tied to potential legal wiretapping of the Trump campaign, Trump or Trump Tower.

The resolution comes after Graham fired a warning shot to the FBI on Tuesday, telling reporters that the bureau was about to "screw up big time" if they didn't respond to his letter.

Graham’s subcommittee is probing Russian influence in the presidential election. The bureau headed the investigation into the hack of the Democratic National Committee (DNC) and is reportedly probing connections between the Trump campaign and Russia.

Both lawmakers argued Wednesday that the bureau should make the investigation public.

“I just want to let the American people know that this subcommittee — we’re going to get an answer to whether or not the Trump campaign was surveilled. Was a warrant ever requested? Was it issued?” Graham said.

“And I hope to be able to answer the question of is there an active investigation.”

"It is now not only appropriate but incumbent upon law enforcement to say, 'We are looking at this. We intend to get to the bottom of this,' " Whitehouse said.

The president earlier this month claimed that former President Obama had ordered surveillance of Trump Tower during the campaign.

“Terrible! Just found out that Obama had my ‘wires tapped’ in Trump Tower just before the victory. Nothing found. This is McCarthyism!” Trump tweeted.

In addition to Graham's subcommittee, the Senate and House Intelligence committees are also probing Moscow's meddling in the White House race and any potential contacts between the Trump campaign and Russia.