Federal investigators interviewed a whistleblower from the office of New York Attorney General Letitia James (D) for several hours on Tuesday after he alleged that staff were directed to target President Donald Trump and his associates, according to a source familiar with the interview.

Daniel Wiesenfeld, an assistant attorney general now on paid administrative leave, met with criminal and civil attorneys from the FBI and Justice Department, a source familiar with the matter confirmed to the Washington Examiner. The scope of the federal interest and whether investigators have opened a formal investigation are unclear.