The FBI in October requested an interview with the whistleblower whose complaint fueled the impeachment inquiry into President Donald Trump and Ukraine, a person familiar with the situation said Wednesday.
Meanwhile, FBI counterintelligence officials were said to be especially concerned about claims in the report that Trump's attorney Rudy Giuliani and associates Igor Fruman and Lev Parnas may have been manipulated by Russian interests, according to a former senior U.S intelligence official who has discussed the matter with current FBI counterintelligence agents.
The FBI has reached out to lawyers representing the whistleblower in the Ukraine investigation in order to interview the anonymous Central Intelligence Agency official, according to several reports on Wednesday.
The source did not provide further details regarding the FBI's specific interest.
An FBI spokeswoman declined to comment. Yahoo News first reported the interview request.
The interview never took place. The debate focused on how to respond to the issues raised by the complaint's allegations regarding the now-infamous July call between President Trump and Ukrainian President Volodymyr Zelensky, according to Yahoo.
Trump's fellow-Republican supporters have demanded that the whistleblower testify before Congress but Democratic lawmakers want the person's identity protected.
In the complaint, the whistleblower expressed concern about the call, reporting that Trump and his personal lawyer, Rudolph Giuliani, were "pressuring a foreign country to investigate one of the President's main political rivals".
In August, after learning about the whistleblower complaint, the Justice Department's criminal division reviewed the whistleblower complaint and found that there was no violation of campaign finance laws.
The FBI might also have wanted to learn about threats made against the whistleblower.
A rough transcript of the call was released in September by the White House.
Because the whistleblower is not a first-hand witness, congressional Democrats have decided they do not need the person's testimony and the ongoing impeachment hearings.