I'm a Bernie supporter. There is no viable 3rd party in America, particularly when it comes to Presidential races, Independent votes only pull votes from the Dems. We can't have Trump win in 2020 so the answer is no, I'd unfortunately have to vote for whoever the Dems put up, just like I did in 2016. The misguided people that voted for Trump in 2016 (the ones who would have voted Sanders) were the ones that were fed up with D.C. and couldn't stand Clinton, which is the exact reason we can't put up a centrist in 2020. That said, regardless of how people feel about his disposition, Internet trolls, Bernie-bro nonsense, various identity politics, etc, if you want to look at voting records, he's been (for the most part) the furthest left, most consistently, for the longest amount of time. He's been fighting for the underclass since the early 60s, to the detriment of his political career, which tells me he's the real thing.