Per Mediate (http://www.mediaite.com/tv/bernie-sanders-explains-why-hell-never-run-as-third-party-candidate/)
“If it happens that I do not win that process, would I run outside of the system? No, I made the promise that I would not and I will keep that promise,” Sanders said. “And the reason for that is I do not want to be responsible for electing some right-wing Republican to be president of the United States.”
Pretty sad when Sanders is more responsible than Trump.