Ben Carson, a former GOP presidential candidate who now supports Republican presidential nominee Donald TrumpDonald TrumpMeghan McCain: Democrats 'should give a little credit' to Trump for COVID-19 vaccine Trump testing czar warns lockdowns may be on table if people don't get vaccinated Overnight Health Care: CDC details Massachusetts outbreak that sparked mask update | White House says national vaccine mandate 'not under consideration at this time' MORE, said leaked emails that show Democratic Party leaders planned to undermine Sen. Bernie SandersBernie SandersAngst grips America's most liberal city Democrats warn shrinking Biden's spending plan could backfire Democrats say they have the votes to advance .5T budget measure MORE's (I-Vt.) campaign is proof that the system is corrupt. 

ADVERTISEMENT

"I knew that there was corruption, but the level of corruption throughout the political system is overwhelming," Carson said Sunday on Fox News. 

"And I'm talking about the established Democrats and the established Republicans, who are much more interested in holding on to power and their positions than they are about their party or about their country. 

"This is really very sad, and I hope that more people will wake up and see what's happening," Carson said. 

Emails released by WikiLeaks on Friday showed top officials at the Democratic National Committee discussing ways to undermine Sanders's presidential campaign.

On Sunday, Sanders called on Democratic National Committee Chairwoman Debbie Wasserman Schultz to resign. He said the emails proved what he's been saying all along: that the party favored presumptive Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonClintons, Stacey Abrams meeting Texas Democrats Biden says Russia spreading misinformation ahead of 2022 elections Highest-ranking GOP assemblyman in WI against another audit of 2020 vote MORE from the start. 

Meanwhile, Clinton's campaign manager on Sunday questioned whether Russia was behind the leaked emails.

"It's troubling that some experts are telling us this was done by the Russians for the purpose of helping [GOP presidential nominee] Donald Trump," Robby Mook said on ABC's "This Week."