Seems to me Hillary, Rubio, Bush, and Kasich are a lot more likely to start a nuclear war than Trump or Sanders. After all, they want to go to war with Russia to make Syria safe for Jihadists and who how “tough” they are. And they seem to have learned nothing from Iraq and Libya.
The way Obama has set up the dominoes, it may not matter who gets elected. I am not absolutely certain we will make it to the next president. And I don’t trust any of the those whose names you mentioned. Putin would run all over Sanders and Sanders would be happy to join him in global socialism/communism. So yeah, we may could avoid war that way, by surrender.