Ex-Trump Aide Sam Nunberg Says He Will Refuse Grand Jury Order. Unless He Doesn’t. But they are unfairly targeting Roger Stone.” The subpoena also demands any documents related to Carter Page, a former Trump campaign foreign policy adviser who was secretly surveilled by the Justice Department as part of the Russia investigation, as well as Paul Manafort, the former Trump campaign chairman, and his deputy, Rick Gates. Sam Nunberg, a onetime Trump campaign aide who recently met with investigators for the special counsel, set cable news alight on Monday when he declared that he was subpoenaed to go before a grand jury on Friday, but that he was unlikely to appear or to provide documents he was ordered to hand over. They include President Trump; the departing White House communications director, Hope Hicks; the former campaign manager Corey Lewandowski; Stephen K. Bannon, the president’s former chief strategist; Mr. Trump’s longtime bodyguard, Keith Schiller; the former Trump Organization lawyer Michael D. Cohen; and Mr. Stone, a longtime confidant of Mr. Trump’s. Mr. Nunberg was fired by Mr. Trump during the summer of 2015 and thus was gone from the campaign in November. Mr. Nunberg added that the president often sounded “like a moron, but this whole thing is a witch hunt.” Mr. Nunberg said he anticipated his lawyer, Patrick J. Brackley, would fire him for speaking publicly. Part of the subpoena document, which Mr. Nunberg provided to , is dated Feb. 27 and makes no mention of requiring him to appear before the grand jury.