Both Ted Cruz and John Kasich have fallen by the wayside, while Donald Trump dashed to the finishing line of Republican Party nomination for the US presidential race in 2016.

Top Republicans are divided on whether to support Donald Trump after the businessman all but secured the party's presidential nomination.

This is the season of lies. We watch with fascination as candidates for the world's most powerful job trade falsehoods and allegations of dishonesty.

Ted Cruz nails down all 14 delegates up for grabs at the Republican Party convention in Wyoming.

The UN High Commissioner for Human Rights condemns the policies of US Republican presidential front-runner Donald Trump, equating them to bigotry.

Republican Donald Trump says the party's leaders do not want him to win the presidential nomination, and the rules are "stacked" against him.

Texas Senator Ted Cruz scores a commanding victory over Donald Trump in Wisconsin's presidential primary Tuesday, putting the Republican frontrunner on notice that his march to the nomination is not a done deal.

Donald Trump wins two more states, Michigan and Mississippi, in his bid for the White House.

White House hopefuls Ted Cruz and Marco Rubio unleashed a barrage of attacks against Donald Trump during Thursday's raucous Republican debate as they sought to halt the billionaire frontrunner's seemingly relentless march to the party's nomination.

Donald Trump wins Tuesday's Republican presidential caucuses in Nevada, giving the billionaire businessman his third straight win in the race for the White House.

Ted Cruz fells long-time Republican frontrunner Donald Trump and Democrat Hillary Clinton was battled into a virtual tie with rival Bernie Sanders on Monday, as Iowans held the inaugural vote of the 2016 White House race.

US presidential candidates are making a final pitch to people in the state of Iowa, where the first votes for party nominations will take place on Monday.

Donald Trump has been mocked by his Republican rivals at a televised debate in Iowa, after quitting the event in a row with Fox News.

Republican presidential candidates spar over national security issues and how best to counter the so-called Islamic State (IS) in the first debate since attacks in California and Paris.

Senator Ted Cruz will declare on Monday that he will run for president in 2016, making him the first major hopeful to formally enter the race