The US and Russian nuclear arsenals are, essentially, still on hair-trigger alert despite the Cold War having ended over 20 years ago. And the biggest danger in having a belligerent person, like Donald Trump, as Commander-in-Chief of the US Nuclear Arsenal, comes from the potential that such a person would have for accidentally causing the use of nuclear weapons by Russia, against the United States.
I would ask others to take a look at a paper titled ‘Accidental Nuclear War – The Real Danger of a Donald Trump Presidency’ which is posted at www.
nucleardanger.org and that discusses this in more detail.