(a)
Whoever knowingly and willfully threatens to kill, kidnap, or inflict bodily harm upon—
(1)
a former President or a member of the immediate family of a former President;
(2)
a member of the immediate family of the President, the President-elect, the Vice President, or the Vice President-elect;
(3)
a major candidate for the office of President or Vice President, or a member of the immediate family of such candidate; or
(4)
a person protected by the Secret Service under section
3056
(a)(6);
shall be fined under this title or imprisoned not more than 5 years, or both.