Mueller asking witnesses about hacked Democratic emails: report

Investigators for special counsel Robert MuellerRobert (Bob) Swan MuellerKamala Harris says her Justice Dept would have 'no choice' but to prosecute Trump for obstruction Kamala Harris says her Justice Dept would have 'no choice' but to prosecute Trump for obstruction Dem committees win new powers to investigate Trump MORE have asked witnesses in their probe about President TrumpDonald John TrumpTrump says 'Failing New York Times' should be held 'fully accountable' over Russia report Trump says 'Failing New York Times' should be held 'fully accountable' over Russia report Trump tweets ICE will begin removing 'millions' of undocumented migrants MORE’s connection to Democratic emails that were hacked and leaked leading up to the 2016 election, NBC News reported Wednesday.

Mueller’s team has reportedly focused on whether Trump was aware of plans for WikiLeaks to publish emails from the Democratic National Committee (DNC) and members of Hillary ClintonHillary Diane Rodham ClintonBroadway play 'Hillary and Clinton' closing early due to low ticket sales Broadway play 'Hillary and Clinton' closing early due to low ticket sales Facing challenge from Warren, Sanders touts strength against Trump MORE’s campaign, or if Trump was involved in the emails’ release.

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Investigators have also honed in on Trump’s relationship with Republican operative Roger StoneRoger Jason StoneHouse panel subpoenas Flynn, Gates House panel subpoenas Flynn, Gates Court orders release of sealed documents in mysterious Mueller grand jury case MORE, an informal adviser during the 2016 campaign. They have reportedly asked witnesses about Stone’s connections to WikiLeaks, and if he’s met the site’s founder, Julian Assange. 

Stone told NBC in a statement that he has not been interviewed by the special counsel and “never discussed WikiLeaks, Assange or the Hillary disclosures with candidate Trump, before during or after the election.”

The lines of questioning come as Mueller probes Moscow's meddling in the 2016 presidential election, including ties between Trump campaign associates and Russia.

In March 2016, Russians successfully hacked Clinton campaign chairman John Podesta’s email account. WikiLeaks later released stolen emails from the DNC as well as emails from Podesta himself in the months leading up to the 2016 election.

Seizing on the controversy, Trump declared “I love WikiLeaks” at a campaign rally while he read some of the leaked messages. 

According to NBC, investigators are also interested in Trump’s comments on the campaign trail about emails then-opponent Clinton deleted from the private email server she used while secretary of State

"Russia, if you're listening, I hope you're able to find the 30,000 emails that are missing," Trump said during the July 2016 press conference.

The White House later said Trump was joking when he made those comments.

Trump has repeatedly declared the federal Russia probe a “witch hunt” and has denied any collusion between his campaign and Russia.

Trump's former national security adviser Michael Flynn and former campaign associates George PapadopoulosGeorge Demetrios PapadopoulosInquiry into origins of Russia investigation is a scam Trump accuses Democrats of crime amid rising calls for impeachment Comey: Trump peddling 'dumb lies' MORE and Richard Gates have pleaded guilty to charges brought as part of Mueller's investigation.

Former Trump campaign chairman Paul ManafortPaul John ManafortJustice Department intervenes, keeps Manafort from being sent to Rikers Island: report Justice Department intervenes, keeps Manafort from being sent to Rikers Island: report The Hill's 12:30 Report — Presented by MAPRx — Supreme Court double jeopardy ruling could impact Manafort MORE is also facing numerous charges for alleged financial crimes relating to his work as a political agent in Ukraine.

Mueller also filed charges earlier this month against 13 Russian nationals and three Russian organizations for alleged interference in the 2016 race.

Updated: 3:23 p.m.