President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE’s personal attorney Rudy Giuliani Rudy GiulianiThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting CIA found Putin 'probably directing' campaign against Biden: report Democrats fear Russia interference could spoil bid to retake Senate MORE told Fox News on Friday that his mission is to "disrupt the world" while defending his interactions with Ukrainian officials.

"Why are you, the president’s personal attorney, what is your personal — what’s your mission?" Fox News host Martha MacCallum asked Giuliani.

"To disrupt the world," he said, adding, "My mission is to defend my client in the best traditions of the legal profession."

MacCallum pressed Giuliani on whether it was in the president's interest — and not the nation's — to urge a foreign country to investigate former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE, Trump's political rival.

ADVERTISEMENT

Trump's push for Ukraine to investigate Biden, a leading Democratic presidential contender, has drawn mounting scrutiny and spurred House Democrats to launch an impeachment inquiry last week.

“That’s a mischaracterization, Martha,” Giuliani fired back. “It’s in the best interest of my client to unravel the corruption in the Ukraine, which involved mostly collusion in the election into which Joe Biden inserted himself.”

MacCallum responded, “But isn’t that what [Attorney General] Bill Barr is doing? Isn’t that his job at the Justice Department?”

“Well, he wasn’t there when I was doing it,” Giuliani said.

The Trump lawyer defended his role in investigating the Bidens, asserting that the timing of his efforts showed they were unrelated to Biden running for president.

"I started the investigation in November of 2018," he said before seconds later saying that he "ended the investigation" earlier that year.

"How could it possibly be to affect the 2020 election? How would I have known back then that he was going to run?" he added.

Trump’s allies are growing increasingly uneasy with Giuliani’s role at the heart of the Ukraine controversy, but the former New York City mayor, who has made looking into allegations of corruption involving Biden a chief focus of his work recently, is adamant that he’s being wrongly portrayed as a rogue actor and that he will be validated in the end.