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 GrassleyOn The Money — Sponsored by Prudential — Markets roiled by Trump's new tariff threat | Trump lashes out at Canada over trade | Warren looks to block Trump pick for consumer agency The Hill's Morning Report — Sponsored by PhRMA — Defiant Trump meets with House GOP amid border blowback Republican senator calls for face-to-face with EPA’s Pruitt MORE (R-Iowa) and Dianne FeinsteinDianne Emiel FeinsteinGOP senators introduce bill to prevent family separations at border Dem plays audio from child detention center on Senate floor 13 GOP senators ask administration to pause separation of immigrant families 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."

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 WhitehouseLive coverage: FBI chief, Justice IG testify on critical report GAO to look into Trump's reduction of carbon social costs Overnight Energy: Pruitt used security detail to run errands | Dems want probe into Pruitt's Chick-fil-A dealings | Yellowstone superintendent says he was forced out MORE (D-R.I.) and Lindsey GrahamLindsey Olin GrahamOvernight Health Care — Presented by the Association of American Medical Colleges — Trump officials move to expand non-ObamaCare health plans | 'Zero tolerance' policy stirs fears in health community | New ObamaCare repeal plan McCain, Coons: Trump should withdraw controversial refugee nominee GOP senators drafting legislation to keep immigrant families together MORE (R-S.C.) sent letters last year to the Trump campaign, the Trump Organization and Donald Trump Jr.Donald (Don) John TrumpDem group plays audio of children crying at detention facilities outside Trump hotel Trump Jr. cancels fundraiser after Jeb Bush criticism on immigration Erik Prince says he 'cooperated’ with Mueller MORE, President TrumpDonald John TrumpConservatives express concern over House GOP immigration bill Poll: McSally holds 14-point lead in Arizona GOP Senate primary Trump defends Nielsen amid criticism over family separations 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 ClintonLewandowski says 'womp womp' at story of young girl being separated from mother at border Giuliani: FBI asked me about tease of a 'surprise' before election Republicans tear into IG finding on Clinton probe MORE and a 2016 Trump Tower meeting with a Russian lawyer offering information on Clinton. 

They also sent letters at the time to Paul ManafortPaul John ManafortVirginia jail says Manafort is not receiving 'special privileges' Live coverage: FBI chief, Justice IG testify on critical report The Hill's Morning Report — Sponsored by PhRMA — Outcry raises pressure on GOP for immigration fix MORE — Trump's former campaign manager — and Glenn Simpson, whose Fusion GPS research firm commissioned the controversial "dossier" on Trump and Russia. 
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. 
Democrats believe the committee should be focused on potential collusion between Moscow and the Trump campaign, as well as then firing of former FBI Director James ComeyJames Brien ComeyGiuliani: FBI asked me about tease of a 'surprise' before election Republicans tear into IG finding on Clinton probe FBI agent Peter Strzok escorted from building amid internal review MORE
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.