The title is BS.
Trump has no need to contact anyone.
Anytime anyone makes a violent public threat on a major presidential candidate the FBI/SS and other agencies are supposed to investigate.
Given the ineptness and moral squalor of the SecServ under Caliph Baraq, I’d advise Trump (or any other R candidate) to avoid them completely until Nov 2016 and depend on his own hired hands.
My thought is that they would more likely function as enemy spies for the Democrat party.
Maybe.
But with this administration, every agency in government has become politicized.