Photo: AP

On Tuesday, Vermont Senator Bernie Sanders won West Virginia’s Democratic primary, making the state his second straight victory that party leaders don’t think will make a difference.

In a clip released earlier that day, Vice President Joe Biden told ABC News he felt “confident” Hillary Clinton would be both the nominee and the next president. And when asked about the race last week, President Obama told reporters, “I think everybody knows what that math is.”

Shortly after polls closed on Tuesday, Sanders sent supporters an email celebrating the win while recognizing the campaign’s difficult path ahead.

“We fully acknowledge we have an uphill climb ahead of us, but we’re used to that,” wrote Sanders. “We have been fighting uphill from the day this campaign began, and we’re going to stay in the race until the last vote is cast.”