Donald Trump and Hillary Clinton both took one step closer to securing nominations for the 2016 US presidential race with commanding victories on a night of caucuses dubbed "Super Tuesday".
The pair won seven caucuses each, shortening their odds of facing one another in the race for the White House.
Ted Cruz has won the final Republican caucus of Super Tuesday, with a surprise victory in Alaska.
The victory over Donald Trump comes after the Texas Senator claimed previous results had shown he was the "only" candidate who could beat the party's frontrunner.
Republican presidential nominee front-runner Donald Trump has called Mitt Romney's attack speech "irrelevant".
Mitt Romney launches a scathing attack on Donald Trump, saying the mogul candidate lacks the temperament or judgement for the White House.
Senior members of the US Republican party have begun rallying against leading presidential candidate Donald Trump.