The top Democrat on the Senate Judiciary Committee wants the panel to interview Trump aide and longtime confidant Dan Scavino as part of its investigation into Russian interference in the 2016 presidential election.

Sen. 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.) on Wednesday sent a letter to Scavino, who now serves as White House social media director, requesting a tranche of documents from him in addition to an interview later this month.

“Given your role on the campaign and in the White House, we believe that you have information that would assist the Committee in its investigation related to the 2016 presidential election and the dismissal of Director Comey,” Feinstein wrote. “Accordingly, we are writing to request documents and to schedule an interview with you in January 2018.”

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Scavino, who began his career with Trump in the early 1990s as one of his golf caddies, ran social media for Trump’s presidential campaign and is said to be frequently at Trump’s side in the White House.

Scavino was reportedly with Trump at his golf club in New Jersey the weekend Trump decided to fire then-FBI Director James Comey James Brien ComeyTrump jabs at FBI director over testimony on Russia, antifa Graham: Comey to testify about FBI's Russia probe, Mueller declined invitation Barr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' MORE. In her letter, Feinstein asked Scavino for information related to Comey’s firing or his interactions with Trump.

Scavino has also been swept up in the intrigue surrounding Russian interference in the election.

The Washington Post reported in December that an executive at Russian social media company VKontakte reached out to Scavino and Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE, the president’s eldest son, by email before the election offering to help promote the campaign through the platform.

Feinstein wrote in the letter that the committee “received information that you may have corresponded with Russian nationals regarding Trump campaign social media efforts.”

Committee Chairman 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) did not sign on to Feinstein’s letter but is copied on it. The Senate Judiciary Committee’s Russia probe has been plagued by partisan divisions, with Republicans and Democrats accusing each other of stonewalling the investigation.

She also asked Scavino to provide documents concerning the appointment of Michael Flynn as national security adviser and his subsequent resignation, as well as those pertaining to the June 2016 Trump Tower meeting with Russian lawyer Natalia Veselnitskaya before which Trump Jr. was offered damaging information on Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE.

The top Democrat also asked for any communications with representatives of WikiLeaks, DC Leaks, Guccifer 2.0 or VKontakte.