(CNN) Bernie Sanders will win the West Virginia primary Tuesday, CNN projects, besting Democratic front-runner Hillary Clinton.
Sanders' victory serves as a reminder to Clinton that despite her looming showdown with presumptive Republican nominee Donald Trump, she has yet to formally wrap up her own party's presidential nomination.
"We now have won primaries and caucuses in 19 states," Sanders said at a rally in Salem, Oregon Tuesday evening. "Let me be as clear as I can be. We are in this campaign to win the Democratic nomination."
Sanders acknowledged, however that he faces an uphill climb. And he added a subtle hint that he would seek to unite the party in a general election if he fails to win the nomination.
"While we have many disagreements with Secretary Clinton, there is one area whe-re we agree and that is we must defeat Donald Trump."