Rudy Giuliani, President Trump’s personal lawyer, accused Rep. Trey Gowdy, R-S.C., of “drinking the Kool-Aid” after Gowdy expressed doubt regarding President Trump’s allegations that an FBI “spy” infiltrated his 2016 campaign for political purposes.

“He’s drinking the Kool-Aid,” Giuliani said of Gowdy in an interview with CNN.

Giuliani then condemned Gowdy for how he led the House Select Committee’s investigation on the 2012 Benghazi terror attacks. Democrats have argued that the probe was an effort to thwart Hillary Clinton, who served as secretary of state when the attacks occurred.

“I never understood what he did with Benghazi either. He really screwed that up. I don’t know what he was doing,” Giuliani said.

The comments come after Gowdy claimed the FBI had an “obligation” to look into potential meddling for foreign actors in the 2016 election.

“I am even more convinced that the FBI did exactly what my fellow citizens would want them to do when they got the information they got, and that it has nothing to do with Donald Trump,” Gowdy said Tuesday in an interview with Fox News.

Gowdy did not provide CNN with a comment to Giuliani's statements.

Earlier this month, multiple media outlets identified Stefan Halper, an American who worked at Cambridge University, as an FBI source who met with three Trump campaign staffers, including campaign advisers Carter Page and George Papadopoulos, and campaign co-chair Sam Clovis.

In response, Trump requested that the Justice Department investigate if the “FBI/DOJ infiltrated or surveilled the Trump Campaign for Political Purposes.”

[Trump: FBI embedding spy in 2016 campaign would be 'all time biggest political scandal' if true]

White House press secretary Sarah Sanders revealed afterward the Justice Department “has asked the inspector general to expand its current investigation to include any irregularities with the Federal Bureau of Investigations or the Department of Justice’s tactics concerning the Trump Campaign.”