Republican front-runner Donald Trump went from long-shot contender to become the party's presumptive nominee with a commanding win in Indiana.
US Republican front-runner Donald Trump swept to victory in Arizona but rival Ted Cruz showed some fight with a win in Utah that gave hope to establishment Republicans who fear Trump would lead the party to ruin in the presidential election.
Republican Donald Trump and Democrat Bernie Sanders coasted to victory on a wave of voter anger in the New Hampshire presidential nominating contest, thrashing traditional US politicians in a display of anti-establishment power.
The US presidential race looked suddenly wide open after frontrunners Donald Trump and Hillary Clinton suffered chastening evenings in Iowa, the first step on the long road to the White House.
