There is definitive proof of whether the Trump campaign colluded with Russia during the 2016 election — and it exists in the email inboxes of Jared Kushner, Stephen Miller, Hope Hicks and others.

That's what several former Watergate prosecutors believe, telling Newsweek that evidence of collaboration between the Kremlin and the president's top campaign aides could literally be at Special Counsel Robert Mueller's fingertips. It just has to be uncovered.

"The key difference between this and Watergate is … at the time, you certainly didn't have computers," said Nick Ackerman, one of the prosecutors who probed the 1972 break-in at the Democratic party's Watergate offices. "Rather than use burglars to break into the Democratic National headquarters, they used Russian hackers. ... The question is whether that was coordinated in any way with the Trump campaign. Their emails will answer that question, once the special counsel gets its hands on them."