Hillary Clinton has beaten Barack Obama in the latest battle in the Democrat race for the White House.

The former First Lady has won West Virginia with a large majority.

But her rival has more crucial delegate votes meaning he is the clear frontrunner for their party's nomination.

Mrs Clinton told supporters she is more determined than ever to fight on.

"You know I'll never give up. I'll keep on coming back and I'll stand with you as long as you stand with me," she said.

She described the election as "unprecedented" and appealed to voters and the party's so-called superdelegates, who will decide its nominee, to "think hard about where we are in this election, and how we will win in November".

"This is not an abstract exercise," she said.

"This is for a solemn, crucial purpose. To elect a president, to turn our country around, to meet the challenges we face and seize the opportunity.

"It has been a long campaign but it is just an instant in time compared with the lasting consequences of the choice we will make in November."

She said she was "so grateful for this overwhelming vote of confidence".

"There are some who have wanted to cut this race short," she said.

"They say, 'Give up, it's too hard, the mountain is too high', but here in West Virginia you know a thing or two about rough roads to the top of the mountain.

"We know from the Bible that faith can move mountains, and my friends the faith of the Mountain State has moved me.

"I am more determined than ever to carry on this campaign until everyone has had a chance to have their voices heard."

She praised Mr Obama and said: "This continues to be a hard-fought race from one end of our country to the other, and yes we've had a few dust-ups along the way, but our commitment to bring America new leadership, that will renew America's promise, means that we have always stood together on what is most important."

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