He's not crazy like Trump, but he's on the fringe of American politics. Out of 100 senators he's the most liberal. Doesn't make sense that the most liberal or conservative politician would be who you put up to represent the country. Ted Cruz was number 2 in the GOP. He's not crazy like Trump either, but arguably the most conservative. Mike Lee and Rand Paul are right there with him. Both Bernie and Cruz are ideologues and not particularly pragmatic. I don't think those are qualities you want in a president.