Robert De Niro blasted Rudy GiulianiRudy GiulianiThree Democrats call for investigation into Sidney Powell to move 'swiftly' Fox News bans Rudy Giuliani from appearing: report Alabama official dismisses Lindell claim that 100K votes were flipped from Trump to Biden: 'It's not possible' MORE’s work with the Trump campaign to dispute election results across the country, saying the former New York City mayor is now “representing a mob family.” 

During an appearance on “The View,” co-host Sunny HostinSunny HostinNavarro rips 'dimwit' Trump Jr. on 'The View' for COVID-19 and obesity tweet 'The View's' Navarro tells critics to 'keep on hating' after COVID-19 scare Harris says images of Border Patrol on horseback evoked 'times of slavery' MORE asked the actor what happened to Giuliani. She pointed out that he used to be a federal prosecutor. 

“Giuliani used to prosecute actual mob bosses in the '80s in federal court,” said Hostin, who is also former federal prosecutor. “What happened to him?” 

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“He’s the one who was prosecuting under the RICO Act, the way I understand it,” De Niro said in response. “And now he’s representing a mob family."

“It’s crazy ... I don’t know what happened to him. I feel bad for him,” he added. 

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Giuliani held a tense press conference on Thursday in which he made baseless and sometimes conspiratorial claims alleging the election was stolen from President TrumpDonald TrumpJan. 6 committee chair says panel will issue a 'good number' of additional subpoenas Overnight Defense & National Security — Presented by AM General — Pentagon officials prepare for grilling Biden nominates head of Africa CDC to lead global AIDS response MORE. He referenced the film “My Cousin Vinny” at one point, and black streaks ran down his face from his hair as he spoke. 

The conference received bipartisan backlash. Christopher Krebs, the top federal cybersecurity official who was fired by Trump this week, said it was “the most dangerous 1hr 45 minutes of television in American history.” 

De Niro said he “could not understand” why Giuliani would represent the president, and suggested that maybe he’s doing it “just for the attention, maybe desperation.” He added that Giuliani would receive more praise for speaking out against the president. 

“I can’t understand because it's just as easy to say ‘Look, I can’t buy into this, I can’t go along with this. It’s over, I’m out!’ ” De Niro said. “And he’d have so much respect and people would hire him, and want to hire him, and he’s going this other way, it’s just nuts.”