Graham starts closed-door depositions in FISA probe

Senate Judiciary Committee Chairman Lindsey GrahamLindsey Olin GrahamWhy do Americans worry about North Korea? Senate confirms Ratcliffe to be Trump's spy chief Abrams announces endorsements in 7 Senate races MORE (R-S.C.) said on Tuesday that he has started closed-door interviews as part of his deep dive into the surveillance courts and the FBI’s Russia probe.

Graham confirmed to reporters that he has started the depositions, then escaped into a Senate elevator. 

Graham is using his gavel to probe the Foreign Intelligence Surveillance Court (FISC) surveillance warrants involving Trump campaign associate Carter Page and the FBI’s handling of the investigation into Russia's election meddling and the Trump campaign. 

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He’s requested testimony from more than 20 current Justice Department and FBI officials.

He also wants to call former officials including former FBI Director James ComeyJames Brien ComeyFBI director Wray orders internal review of Flynn case Grenell says intelligence community working to declassify Flynn-Kislyak transcripts FBI director stuck in the middle with 'Obamagate' MORE, former Deputy Attorney General Rod RosensteinRod RosensteinSenate Republicans issue first subpoena in Biden-Burisma probe Graham to release report on his probe into Russia investigation before election McConnell embraces subpoena of Obama-era officials MORE and former Deputy Attorney General Sally YatesSally Caroline YatesSenate Republicans issue first subpoena in Biden-Burisma probe READ: Susan Rice's email discussing Michael Flynn and Russia McConnell embraces subpoena of Obama-era officials MORE before his committee.

The deep dive comes amid growing concerns about the potential for abuse of the FISC after Justice Department Inspector General Michael Horowitz found 17 “significant inaccuracies and omissions” in the Page warrant application. 

Some of President TrumpDonald John TrumpMulvaney: 'We've overreacted a little bit' to coronavirus Former CBS News president: Most major cable news outlets 'unrelentingly liberal' in 'fear and loathing' of Trump An old man like me should be made more vulnerable to death by COVID-19 MORE’s biggest allies want to use a debate over soon-to-expire provisions of the USA Freedom Act to make broader changes to the surveillance court.

Trump is convening a meeting on Tuesday afternoon with lawmakers on both sides of the debate to try to break the stalemate.

Congress has until March 15 to extend three provisions of the USA Freedom Act.