Rep. Darrell Issa (R-Calif.) said Tuesday that it's "absolutely" warranted for GOP leaders to ask Justice Department Inspector General Michael Horowitz to investigate alleged threats by Deputy Attorney General Rod Rosenstein in January.

As Fox News reported:

The letter comes after Rosenstein apparently threatened to “subpoena” emails, phone records and other documents from lawmakers and staff on a Republican-led House committee during a meeting earlier this year, according to emails reviewed and first reported by Fox News.

"The reality is that if you have a chilling effect on the oversight on behalf of the American people by Congress, then who does double-check the all-powerful?" Issa asked.

Speaking on "America's Newsroom," he added that using Horowitz to conduct oversight on Rosenstein is "critical" and that the type of alleged misconduct must be looked at.

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Rep. Issa also said Tuesday that FBI agent Peter Strzok's actions show that Americans can't "blindly trust" the country's agencies.

Issa referred to Strzok as a "bad actor" and said that he's an example of someone who did not loyally serve the United States.

Strzok testified before GOP lawmakers last week regarding his alleged bias against President Trump.

"We must trust and verify," Issa said.

Issa said that Strzok's paramour within the FBI, Lisa Page, kept herself out of peril during her deposition last week.

He said that her testimony was revealing of "new information that makes us understand the operation."

"The one thing that's disconcerting, of course, is that ... her discounting of the importance of their role and her statement that they couldn't have made any essential differences because there were so many hands and people handling things," he said.

"That part I don't quite swallow."

Watch the segment above.

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