I'm not sure _why_ NPR put this as the _last_ paragraph, but I do think it's worth paying attention to.
"According to exit polls, just 33 percent of Democratic primary voters said they definitely would vote for the Democratic nominee; 27 percent said they would vote for Trump. Forty-four percent of Sanders voters said they would support Trump in the fall, while just 23 percent would vote for Clinton."
I remember the 2008 race in some detail. Winning West Viriginia is something that a Democratic candidate would obviously like, from the perspective of getting delegates. But as one of the last holdouts of That Other Kind of Democrat, winning West Virginia is an uncomfortable thing for anyone running in a national election.