Trump dismisses Russian ties to DNC email leak
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Donald TrumpDonald John TrumpRand's reversal advances Pompeo New allegations could threaten Trump VA pick: reports President Trump puts on the pageantry for Macron’s visit MORE called it laughable that Russia would aid his presidential campaign by leaking a trove of Democratic National Committee (DNC) emails.

WikiLeaks published 20,000 internal DNC emails last Friday, with some showing top officials seemingly working to undermine Bernie SandersBernard (Bernie) SandersOvernight Finance: Treasury mulls sanctions relief for Russian aluminum firm | Trump floats tying NAFTA talks to border security | 14 states hit record-low unemployment Kamala Harris will no longer accept corporate PAC money Judd Gregg: Who wins with Paul Ryan's departure? MORE in his race against Hillary ClintonHillary Diane Rodham ClintonOvernight Defense: Pompeo clears Senate panel, on track for confirmation | Retired officers oppose Haspel for CIA director | Iran, Syria on agenda for Macron visit George H.W. Bush in intensive care GOP chairmen say they have deal with Justice on documents MORE for the party's presidential nomination.

Sanders’s camp has repeatedly accused DNC Chairwoman Debbie Wasserman Schultz, who announced she would resign after this week's Democratic National Convention, of giving Clinton in an edge. 

In one May 21 email, DNC press secretary Mark Paustenbach wrote to communications director Luis Miranda about reaching out to reporters and telling them Sanders's campaign was a "mess."

“Specifically, [Wasserman Schultz] had to call Bernie directly in order to get the campaign to do things because they’ve either ignored or forgotten to do something critical. It’s not a DNC conspiracy, it’s because they never had their act together."

Clinton’s campaign manager on Sunday questioned whether Russia may have been involved in the hack that stole the emails.

“What’s disturbing about this entire situation is that experts are telling us that Russian state actors broke into the DNC, took all those emails and are now leaking them out through these websites,” Robby Mook said on ABC’s “This Week.”

“It’s troubling that some experts are telling us this was done by the Russians for the purpose of helping Donald Trump,” he added.

The leak comes ahead of the party's national convention in Philadelphia, where Clinton is expected to accept the presidential nomination.