Advertisement Biden campaign officials demand TV networks stop booking 'dedicated liar' Rudy Giuliani to 'spread false, debunked conspiracy theories for Donald Trump'

Aides to former vice president slammed Giuliani as a 'dedicated liar' whose 'only obligation is to protect Donald Trump'

Giuliani has made numerous television appearances to discuss his role in the ongoing Ukraine scandal 

 During his interviews, the former New York mayor has made a number of unsubstantiated allegations accusing Biden of corruption 

 On Sunday, Giuliani told CBS News that then-Vice President Biden pressured Ukraine to fire a prosecutor who was investigating his son's gas company
    

 But a former Ukrainian prosecutor said there is no evidence that Biden acted improperly

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