Sanders supporters in 2016, like Nader supporters in 2000, conflate integrity with intelligence. If they help defeat Hillary, as Nader supporters did Gore, then white nationalism wins the White House.
Sanders supporters should continue to fight for a social welfare state, but helping put Trump in office won’t accomplish that. Learning from the past, they should vote Hillary, then fight her administration, and continue taking over the Democratic Party, building on the foundation of the Sanders campaign.
Sanders supporters accomplished a lot, and they would be remiss to throw it all away. If they set their sights on securing their Democratic Party position at the local and state level, they will acquire greater influence at the national level. Real commitment to implementing social values requires thinking long term.