US Democratic candidate Bernie Sanders has defeated Hillary Clinton in West Virginia's primary. The loss slows Clinton's march to the nomination, but she is still heavily favored to become the Democratic candidate in the November 8th election.

On the Republican side, Donald Trump has won contests in West Virginia and Nebraska handily. The presumptive Republican nominee is set to meet with party leaders in the US Congress on Thursday. In a November showdown with Trump, Clinton would need to win over working-class voters in the US rust belt, which includes key states such as Ohio and Pennsylvania.