Clinton Campaign Official Doesn't Close Door on More Email Leaks

When WikiLeaks released nearly 20,000 emails from top Democratic National Committee officials last week, it led to the ouster of DNC chairwoman Debbie Wasserman Schultz and stirred unrest within the party days before the Democratic National Convention kicked off Monday in Philadelphia.

Clinton Communications director Jennifer Palmieri told ABC News that even more emails could become public.

"The WikiLeaks [release] was obviously designed to hurt our convention," Palmieri said.

Palmieri said "you can't ever really know" when emails will be leaked but "it's part of the reason why we wanted people to understand our belief that the Russians are behind this, because people understand when these leaks happen what they're designed to do."

On "GMA" this morning, Clinton campaign manager Robby Mook told George Stephanopoulos that the email hack was a "concerning situation," adding that Russia was likely behind the leak.

"It's a concern that an aggressive regime like Vladimir Putin's could be trying to not just infiltrate the email system of the Democratic Party but actually influence the outcome of the election. I think it's also very troubling that we heard Donald Trump not just praise Vladimir Putin, but...we heard Donald Trump talk about how he would not necessarily defend our eastern European NATO allies from Russian aggression," Mook told Stephanopoulos.

Putin's press secretary, Dmitry Peskov, denied accusations that Russia was responsible for the hack.

"We're still witnessing attempts to use the Russian issue - in a paranoid way - during the U.S. election campaign," he told reporters today. "There's nothing new here, it's a sort of traditional pastime of theirs. We think it's not good for bilateral ties but we realize that we have to go through this unfavorable period."

Trump's campaign manager Paul Manafort has disputed claims that the candidate was somehow connected to the email release. Trump himself responded to the insinuations, tweeting Monday that "The new joke in town is that Russia leaked the disastrous DNC e-mails, which should never have been written (stupid), because Putin likes me."

The DNC did not immediately respond to a request for comment.