Senate panel requests info on Trump aides for Russia probe
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Top members of the Senate Judiciary Committee are expanding their probe into Russia's election meddling, asking for details on the communications of two Trump campaign aides.

Sens. Chuck GrassleyCharles (Chuck) Ernest GrassleyDem: 'Bulls---' to say GOP doing everything to contact Kavanaugh accuser Grassley wants unredacted version of letter from Kavanaugh's accuser Attorney for Kavanaugh accuser criticizes Senate panel's ‘rush to a hearing’ MORE (R-Iowa) and Dianne FeinsteinDianne Emiel FeinsteinThe Memo: Tide turns on Kavanaugh Grassley wants unredacted version of letter from Kavanaugh's accuser Gillibrand: Kavanaugh accuser shouldn't participate in 'sham' hearing MORE (D-Calif.) — the chairman and ranking member of the committee, respectively — sent a letter to the Trump campaign asking for documents related to John Mashburn and Rick Dearborn.

"The Committee has determined that obtaining their responsive emails, or at least ensuring that adequate searches have been conducted that would cover these communications, is necessary for its investigative work," Grassley and Feinstein wrote.

They noted they are sending the request because they "believe information obtained in a recent Committee interview warrants expanding those searches to two additional custodians who were not included in the original effort, John Mashburn and Rick Dearborn."

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Mashburn, who currently serves as a deputy Cabinet secretary, worked as a policy director on the Trump campaign. Dearborn, who announced late last year that he was leaving the White House, also worked on the campaign and the transition team. 

The Senate committee has been looking into Russian interference in the 2016 election since last year.

Feinstein and Grassley noted they sent a letter in July 2017 asking for documents. So far, they said, the campaign has "provided over 28,000 pages of responsive documents, as well as letters detailing the 21 campaign custodians whose emails were searched and the more than 300 search terms used." 

Grassley, Feinstein and Sens. Sheldon WhitehouseSheldon WhitehouseSenate Dems sue Archives to try to force release of Kavanaugh documents Dems call on Senate to postpone Kavanaugh vote Dems play waiting game with Collins and Murkowski MORE (D-R.I.) and Lindsey GrahamLindsey Olin Graham GOP senator: Kavanaugh accuser 'moving the goalposts' Collins: Kavanaugh accuser should 'reconsider,' testify on Monday Grassley willing to send staff to California to speak with Kavanaugh accuser MORE (R-S.C.) sent letters last year to the Trump campaign, the Trump Organization and Donald Trump Jr.Donald (Don) John TrumpFlake condemns Trump Jr. Instagram post mocking Kavanaugh accuser Trump Jr. campaign event looks for new venue after Montana restaurant declines to host The Hill's 12:30 Report — Kavanaugh controversy consumes Washington | Kavanaugh slated to testify Monday | Allegations shake up midterms MORE, President TrumpDonald John TrumpLondon terror suspect’s children told authorities he complained about Trump: inquiry The Memo: Tide turns on Kavanaugh Trump to nominate retiring lawmaker as head of trade agency MORE's eldest son, asking for a slew of information about potential contacts with Russian officials, attempts to obtain damaging information on Democratic candidate Hillary ClintonHillary Diane Rodham ClintonHillicon Valley: Trump's exclusive interview with Hill.TV | Trump, intel officials clash over Russia docs | EU investigating Amazon | Military gets new cyber authority | Flynn sentencing sparks new questions about Mueller probe READ: President Trump’s exclusive interview with Hill.TV Keeping up with Michael Avenatti MORE and a 2016 Trump Tower meeting with a Russian lawyer offering information on Clinton. 

 
Thursday's joint Grassley-Feinstein letter comes as the Judiciary Committee's probe into Russia's election meddling has grown increasingly fractured in recent months. 
 
 
Republicans, meanwhile, are digging into actions under the Obama administration, including the FBI's handing of its Russia probe and a separate investigation on Clinton's private email server.