Biden has the minority vote pretty secured. Which is not surprising. Sanders' base is very white. A lot Hispanic voters were alienated by his comments about Castro and a lot of black voters see him as just another old white man telling them what to believe. If Biden wins, it's because Sanders, like in 2016, can't secure the minority vote.
Won't stop the Bernie Bros from calling Warren a spoiler. Like they're already doing. I guess it's too much to ask that they just try to realize that some people just. Don't. Like. Bernie. Sanders.