Donald Trump has triumphed in the Nevada caucus, winning 43 per cent of the vote, according to reports.
Meanwhile, with just over 25 per cent of precints having reported, Marco Rubio was thought to have clinched second place, with just under 25 per cent of the vote, while Ted Cruz was at 22 per cent.
Ben Carson trailed behind, at five per cent, while John Kasich had just under four per cent.
The win means Trump has taken the Republican nomination in three of the four states which have voted so far, including South Carolina and New Hampshire.
At a party at his Las Vegas resort, the Treasure Island Hotel & Casino, The Guardian reported Trump basked in his victory, saying he had "won with the highly educated. We won with the poorly educated. I love the poorly educated. We’re the smartest people, they're the most loyal people".
On CNN, he added: "We're going to get greedy for the US, we're going to grab and grab."
The victory clears the way for Trump to go into so-called Super Tuesday on 1 March, when 12 states will choose nominees for the presidential contest in both parties.