US presidential hopeful Hillary Clinton has won a narrow victory over Bernie Sanders at the Nevada caucuses.

Despite hoping for a clear victory ahead of Sanders, Clinton won 52 percent of the vote and the former gained 48 percent.

Meanwhile, in South Carolina, Donald Trump hopes to beat Senator Ted Cruz in the Republican primary.

hillary clinton

Although this is only a small lead, the vote could prove key in the ‘Super Tuesday’ round, where a dozen states are set to choose their Democratic and Republican nominees for November’s election.

Tweeting, Clinton wrote “this is your win”, declaring the victory.

She was previously beaten in New Hampshire, but won in Iowa.

Having expected a much larger win, Clinton is popular with Hispanic and minority voters in Nevada.

Hillary Clinton was forced to defend her previous views on same-sex marriage after she was quizzed by an audience member during a live debate.

Joe Sacco – a Las Vegas real estate agent and Bernie Sanders supporter – told the former Secretary of State that he had been a big supporter of both Clinton and her husband – former President Bill – ten years ago.

However, Sacco said he lost faith in the pair when they refused to support marriage equality.

“Secretary Clinton, I do respect you very much. In fact, only a decade ago I was a very, very big supporter of yourself and your husband,” he began.

“It actually broke my heart when you said marriage was between a man and a woman. How can we trust that this isn’t just more political rhetoric?”

Clinton admitted, once again, that she had “evolved” on the issue – and was “glad” to have done so.

“I am a 100 percent supporter and I am absolutely adamant about protecting marriage equality,” she said.

And I think it’s significant that the Human Rights Campaign, the leading organization in our country to ensure that the LGBT community has the rights they deserve, have endorsed me.”