IS because they didn't get the vote from African Americans like they did with Obama. I think this is one reason you see them trying so hard to put out there that he is a racist. Kinda like how a lot of us Trump voters where in the never Hillary IMO they want to put this race of people in the never Trump vote in hopes of beating him in 2020. I imagine they will run some white pervert like Biden and know that they won't get that voter block again like they did with Obama. This is basically the only move they have left in hopes of bring those votes back.