18 USC 879
Section 879. Threats against former Presidents and certain other persons
(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.
Thanks for posting the law, but I do not see where Drudge has done any wrong.