The Senate intelligence committee has asked for documents from former presidential candidate Jill Stein as part of its inquiry into Russian interference in the 2016 election, adding another new thread to the panel’s investigation as it heads into the new year.

Stein said in a statement overnight Tuesday that she was cooperating with the investigation and is providing documents to the committee. She has captured the interest of investigators partly because she attended a 2015 dinner sponsored by the Russian television network RT with Vladimir Putin.

Quick Guide What are the Trump-Russia congressional inquiries? Show Beyond Mueller Three separate congressional committees are investigating Russian tampering in the 2016 presidential election and possible collusion between Russia and the Trump campaign: the Senate judiciary and intelligence committees, and the House intelligence committee. The committees have the power to subpoena witnesses and documents. The list of witnesses to have been interviewed so far is long, and includes Donald Trump Jr and Jared Kushner, as well as lesser figures such as former adviser Carter Page; Glenn Simpson, the co-founder of Fusion GPS, which commissioned the Steele dossier; and Ben Rhodes, the former Obama adviser. Senate intelligence committee The most aggressive of the three committees so far, with a reasonable appearance of bipartisanship. Republican chairman Richard Burr of North Carolina said in October that the question of potential collusion between the Trump campaign and Russian operatives remained open. But Burr has also said the committee was not focused on “criminal acts” but a larger picture. The committee notably heard testimony from James Comey after the former FBI director was fired. Senate judiciary committee Hampered early on by partisan disagreement about the scope of its investigation, the committee has interviewed top witnesses including Donald Trump Jr and has taken a particular focus on the firing of James Comey. But the committee has deferred to Mueller in the investigation of Paul Manafort and has interviewed fewer witnesses than others.

House intelligence committee Riven by partisan conflict, the committee appears to be on track to produce two reports – one from each party. Chairman Devin Nunes recused himself from the inquiry in March after Trump tweeted that Barack Obama had "tapp[ed] my phones" and Nunes, in an apparent attempt to defend the president, revealed that some communications involving Trump aides had been intercepted by US surveillance programs.



The Senate intelligence committee chairman, Richard Burr, a Republican from North Carolina, appeared to confirm the investigation’s new focus on Stein on Monday evening. Asked what the committee wanted to know about from Stein’s campaign, Burr responded: “Collusion with the Russians.”

The request to Stein is more evidence that the Senate panel will still have much work to do in 2018. While the investigation has largely focused on both the Russian interference and whether it was in any way connected to Donald Trump’s campaign, investigators are following multiple leads.

The top Democrat on the panel, Mark Warner of Virginia, would not confirm the investigation into Stein but noted on Tuesday that she was at what he called the “infamous dinner” with Putin. Michael Flynn, who later became Trump’s national security adviser, also attended the 2015 dinner in Moscow. Flynn is cooperating with Robert Mueller’s investigation into the Russian meddling and has pleaded guilty to a count of making false statements to FBI agents.

Warner also said Stein had said complimentary things about Julian Assange, the founder of WikiLeaks, who Warner said “clearly was being used by the Russians to take some of the hacked information and release into our political system”.

WikiLeaks released stolen emails from several Democratic officials during the campaign. Assange denies receiving the material from Russia.

Stein ran against Trump and Hillary Clinton as the candidate of the Green party and received about 1% of the vote.

She said in the statement on Tuesday the documents show that she “made the trip with the goal of reaching an international audience and Russian officials with a message of Middle East peace, diplomacy and cooperation against the urgent threat of climate change, consistent with longstanding Green principles and policies”.

As the Senate investigation continues, the House intelligence committee is working to wrap up its own investigation into the meddling early next year. Investigators are interviewing multiple people this week in hopes that they will finish most of that work before the end of the year. A final report – or two final reports, if Democrats decide to write their own – could come in early 2018.

The House intelligence committee is interviewing the FBI deputy director, Andrew McCabe, on Tuesday as Republicans have charged political bias among the ranks of the FBI. They have focused on hundreds of text messages between an FBI counterintelligence agent and an FBI lawyer that show the officials using words like “idiot” and “loathsome human” to characterize Trump as he was running for president in 2016.

Peter Strzok, a veteran FBI counterintelligence agent, was removed from Mueller’s team over the summer following the discovery of the text messages exchanged with Lisa Page, an FBI lawyer who was also detailed to the group of agents and prosecutors investigating potential coordination between Russia and Trump’s Republican campaign.

The messages were reviewed by the Associated Press.