U.S. television networks projected Tuesday evening that Vermont Senator Bernie Sanders had narrowly won the Democratic presidential primary in West Virginia over former Secretary of State Hillary Clinton.
Sanders was expected to add another 13 delegates, but still has no chance to overcome Clinton's huge lead in the delegate count.
Earlier this year, Clinton angered many West Virginia voters when she declared that she would put "a lot of coal miners and coal companies out of business" if elected president.
Coal is dangerous to mine and is a polluting energy source, but parts of the state are heavily dependent on coal for jobs and revenue.
Clinton apologized last week to West Virginia voters, saying, "I want you to know that I'm going to do everything I can to help" those affected by reduced coal demand.
There were no surprises for the Republicans Tuesday. As expected, presumptive nominee Donald Trump won primaries in West Virginia and Nebraska, as he starts considering whom he wants for a vice presidential running mate.
Trump's last two Republican challengers for the nomination dropped out of the race last week.