New Mueller evidence includes links to Bernie Sanders' campaign chief strategist

New documents released by special counsel Robert Mueller related to the invsestigation into former Trump campaign manager Paul Manafort list emails sent to Manafort by Thomas "Tad" Devine, the former chief strategist for the Bernie Sanders campaign.

Devine, who also worked on Al Gore and John Kerry's failed presidential campaigns, exchanged multiple emails with Manafort, Robert Gates, and a Ukrainian man dubbed by Politico as "Manafort's man in Kiev."

What did Mueller release?

On Wednesday, Mueller filed a list of 500 pieces of evidence that his team is thinking about presenting during Manafort's trial. The list contains emails between Manafort and his associates, as well as bank records, financial statements, and photographs.

What pieces of evidence were on the list?

Eleven emails sent from Devine are listed as evidence, as well as an additional email chain that he was a part of. 4 of these are addressed directly to Manafort, while others are addressed to Rick Gates, Manfort's business partner and fellow Democratic consultant Julian Mulvey, and Kostantin Kilimnik, a Ukrainian national dubbed by Politico as "Manafort's man in Kiev." Kilimnik was trained by the Russian Army as a linguist, and also has a reported background in Russian intelligence.

Two additional pieces of evidence are listed as memos from Devine's Democratic media consulting firm, Devine Mulvey Longabaugh, to Davis Manafort Partners in 2010. These are listed as "2010 Message Strategy Proposal #1" and "2010 Message Strategy Proposal #2."

While the context of the emails has not yet been revealed, they have  labels on this evidence list that include "re Kyiv" (an alternative spelling of Kiev, the Ukrainian capital), "re Ukraine," and "re Ukraine trip." While these emails begin in 2010, five of them (three to Gates and two to Kilimnik) were sent by Devine in 2014, with the last one listed as being sent on June 19 of that year. Bernie Sanders would launch his presidential campaign, which Devine work for, just over ten months later on April 30, 2015.

In addition to working on the Sanders campaign, Devine was senior advisor for former-Vice President Al Gore's campaign in 2000 and senior advisor and strategist for then-Senator John Kerry's campaign in 2004. He also worked in a more limited capacity for the campaigns of President Jimmy Carter in 1980, Walter Mondale in 1984 and former Massachusetts governor Michael Dukakis in 1988.

Why is Manafort on trial?

Manafort is facing felony charges in both a Washington D.C. federal district court and a district court in Virginia, related to political and lobbying work he did in Ukraine. These charges include failing to register as a foreign agent, lying to investors, and conspiracy to launder money.

Although Manafort was the Trump campaign chairman, so far none of the charges against him appear to be linked to the president or the campaign.

While he was initially kept under house arrest, he was ordered to jail pending his trial after it was revealed that he had made contact with people he had worked with during his lobbying days, instructing them to testify that he had only paid them in return for work done in Europe, not the United States.