18 U.S.C. § 372 : US Code - Section 372: Conspiracy to impede or injure officer

      If two or more persons in any State, Territory, Possession, or
    District conspire to prevent, by force, intimidation, or threat,
    any person from accepting or holding any office, trust, or place of
    confidence under the United States, or from discharging any duties
    thereof, or to induce by like means any officer of the United
    States to leave the place, where his duties as an officer are
    required to be performed, or to injure him in his person or
    property on account of his lawful discharge of the duties of his
    office, or while engaged in the lawful discharge thereof, or to
    injure his property so as to molest, interrupt, hinder, or impede
    him in the discharge of his official duties, each of such persons
    shall be fined under this title or imprisoned not more than six
    years, or both.