no, but he will cause the risk of proliferation to increase.
This. His business holdings would be too harmed by a nuclear exchange. it's insane we have to rationalize it that way, but there it is. Of the many things that bother me about Trump, this idea that he's going to usher in a nuclear Armageddon is low.
However, proliferation will increase, which is very, very bad. Saudi Arabia is not a country I'd trust with atomic capabilities (neither is Iran, which is why I hope and pray Trump doesn't do anything dumb there)