The Clinton Foundation should be indicted as a racketeering enterprise, former New York City Mayor Rudy Giuliani, a supporter of Republican presidential nominee Donald TrumpDonald John TrumpClinton and Ocasio-Cortez joke about Kushner's alleged use of WhatsApp Missouri Gov. declares state of emergency amid severe flooding Swalwell on Hicks testimony: 'She's going to have to tell us who she lied for' in Trump admin MORE, said Sunday. 

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"She did favors for those very people who gave money to the Clinton Foundation," Giuliani said on "Fox News Sunday." 

When host Shannon Bream pushed back, saying those involved with the foundation have claimed they haven't been under investigation, Giuliani said, "That's the biggest bunch of garbage I've ever heard.

"They are under, I believe, investigation, and if they're not, the Justice Department should be ashamed of themselves." 

The Clinton Foundation's fundraising from corporate and foreign donors has been a target of Republicans, who allege that those supporters had undue influence over the Clintons' work in government.

"She is the consummate corrupt Washington insider," Giuliani said of Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonClinton and Ocasio-Cortez joke about Kushner's alleged use of WhatsApp Hillicon Valley: Kushner accused of using WhatsApp, personal email for official work | White House rejects request for Trump-Putin communications | Facebook left 'hundreds of millions' of passwords unsecured | Tech pressured to root out extremism Man accused of mailing pipe bombs to Dems pleads guilty MORE.

Former President Bill ClintonWilliam (Bill) Jefferson ClintonHoward Schultz is holding the Democratic Party hostage Hill-HarrisX poll: 76 percent oppose Trump pardoning former campaign aides A Weld challenge to Trump would provide Republicans a clear choice MORE said this week that if his wife is elected, the foundation will no longer take foreign or corporate money.