Giuliani says he'll testify in front of Congress if directed by Trump

President TrumpDonald John TrumpAdvisor: Sanders could beat Trump in Texas Bloomberg rips Sanders over Castro comments What coronavirus teaches us for preventing the next big bio threat MORE's personal lawyer Rudy GiulianiRudy GiulianiBill Barr is trying his best to be Trump's Roy Cohn Former US ambassador Yovanovitch lands a book deal: report Kerry responds to Trump accusation he violated Logan Act: 'Another presidential lie' MORE on Sunday called House Intelligence Committee Chairman Adam SchiffAdam Bennett SchiffThe Hill's Morning Report - Sanders steamrolls to South Carolina primary, Super Tuesday Schiff blasts Trump for making 'false claims' about Russia intel: 'You've betrayed America. Again' Trump: Nevada a 'great win' for Sanders MORE (D-Calif.) "an illegitimate chairman" but said he would testify before Congress if instructed to do so by President Trump.

Giuliani told George StephanopoulosGeorge Robert StephanopoulosRahm Emanuel: Sanders is 'stoppable' National security adviser: 'I haven't seen any intelligence' that Russia is trying to help Trump Katie Hill: 'Biphobia' led to resignation from Congress MORE on ABC's "This Week" that he will "be guided by my client."

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"I'm a lawyer," he said. "It's his privilege, not mine. If he decides that he wants me to testify, of course I'll testify."

Giuliani added that he thought Schiff should be removed from his committee post.

"He has already prejudged the case," Giuliani said. "If we want fairness here, we've got to put somebody in charge of that committee who has an open mind, not someone who wants to hang the president."  

Giuliani's appearance, during which he often sparred with Stephanopoulos, came after a whistleblower report released last week regarding the Trump's call with the Ukrainian president put Trump and his lawyer under scrutiny.

The whistleblower report says Trump asked Ukrainian President Volodymyr Zelensky to "look into" former Vice President Joe BidenJoe BidenBiden faces do-or-die primary in South Carolina Democrats view Sanders as having best shot to defeat Trump: poll Karl Rove: 'Long way to go' for Sanders to capture nomination: 'The field is splintered' MORE's son and offered to connect Zelensky with Giuliani.

The House has since started an impeachment inquiry.