Kevin Brock, former assistant director of intelligence at the FBI, on Monday said that it is not the agency's job to investigate an administration's foreign policy stance in the wake of reports saying FBI officials opened an investigation into whether President Trump was working on behalf of Russia.

Brock pointed to other instances of when he said the government provided funding to "enablers in Iran" as examples of not investigating foreign policy, saying, "That's not the role of the FBI."

"Are we criminalizing or are we exercising the authorities, the legitimate authorities, of the FBI to investigate policy differences, to investigate foreign policy stances by an administration?" Brock told Hill.TV's Buck Sexton and Jamal Simmons on "Rising."

"There are a number of us who spent long careers in the FBI combating terrorism. I did," he continued. "So when it was a policy of this government to provide $150 billion to Hezbollah."

"When it was the policy of this government to provide a $150 billion to the Hezbollah enablers in Iran, should we have investigated the president at that time for being under suspicion for operating on behalf of a foreign, hostile nation?" he said. "You can make that argument as well. That's not the role of the FBI."

The New York Times on Friday reported that the FBI had opened an investigation into whether Trump was working for the Russians after he fired former FBI Director James Comey.

The president and his supporters have long claimed that there has been a bias against Trump within the intelligence community.

Trump told reporters at the White House on Monday that he "never worked for Russia."

— Julia Manchester