There has to be some safeguards in countries with nuclear weapons to limit a mad man access to them. I think that is the whole idea behind nonproliferation of nuclear weapons to keep things like this from happening.
Anyway I hope they impeach him on matters of national security before this guy is allowed take charge as Commander and Chief of our armed forces, a person that cares only about himself and wants to bomb the shit out of his perceived enemies and talks in the gruesome ways about those he would attack if he way President, to supposedly teach them a lesson in brutality. Not a guy you want directing the US military.
Homeland Security, NSA, CIA, all of these guys should be doing things to protect this country and are probably working hard in that direction, I'm sure these organization already see the huge threat Donald Trump is for this countries security.