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 TrumpTrump calls for Republicans to be 'united' on abortion Tlaib calls on Amash to join impeachment resolution Facebook temporarily suspended conservative commentator Candace Owens 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 ClintonWarren policy ideas show signs of paying off Biden at campaign kickoff event: I don't have to be 'angry' to win Top Dem: Trump helps GOP erase enthusiasm gap; Ohio a big problem MORE.

Former President Bill ClintonWilliam (Bill) Jefferson Clinton Democratic leaders' impeachment tightrope Several factors have hindered 'next up' presidential candidates in recent years Criminal justice includes food security — we can't ban the social safety net MORE said this week that if his wife is elected, the foundation will no longer take foreign or corporate money.