Now playing Next USA Trump rubbishes Republican rivals over "collusion" Donald Trump has attacked his Republican rivals for teaming up to stop him from winning the party’s presidential nomination. The front-runner in the 25/04/2016
Now playing Next USA Trump and Clinton are the big winners in New York Trump and Clinton score decisive wins in NY Both move closer to securing nominations Next stop – US northeast and five more primaries 20/04/2016
Now playing Next USA Clinton and Trump battle it out on home turf in New York primaries The road to the US presidential nominations has led to New York, with Democrat Hillary Clinton and Republican Donald Trump each billed to win on home 19/04/2016
Now playing Next USA Trump towers in New York Clinton and Sanders in tight race for the five boroughs Fighting for the Democratic presidential nomination Bernie Sanders addressed supporters in the city of his birth, New York City ahead of the states primary. 19/04/2016
Now playing Next world news U.S.: Bernie Sanders wins Wyoming as winning streak continues Bernie Sanders has secured victory in Wyoming in the latest stage of the Democratic nomination contest for the US presidential elections. It was a 10/04/2016
Now playing Next USA Wisconsin: Cruz trumps Trump, Sanders scores against Clinton Ted Cruz and Bernie Sanders shook things up in the race for the US presidential nomination ahead of what is predicted to be a tough fight in the 06/04/2016
Now playing Next USA Breakthrough for Ted Cruz as he scores a double-digit win over Trump Cruz wins double-digit win over Trump Sanders builds on his recent run of wins Clinton needs to get back on track Wisconsin primaries have 06/04/2016
Now playing Next USA Pay up or get out: Trump blasts NATO allies and Clinton responds US presidential contender Donald Trump has blasted NATO allies for not paying their fair share during a campaign rally 03/04/2016
Now playing Next USA Tensions rise between rival candidates in the US presidential race In a new row, Hillary Clinton's Democratic challenger has accused her of relying heavily on fossil fuel lobbyists 02/04/2016
Now playing Next USA US: Trump rows back after sparking abortion row US Republican presidential front-runner Donald Trump is no stranger to controversy – and now he has sparked off a spat over abortion. The billionaire 31/03/2016
Now playing Next USA Trump faces Republican backlash for Lewandowski battery charge Donald Trump faces backlash from Democrats and within his own party over a battery charge against his manager, Corey Lewandowski. 30/03/2016
Now playing Next world news Donald Trump's campaign manager charged with battery The campaign manager of US Republican presidential hopeful Donald Trump has been charged with battery. Corey Lewandowski (pictured above, left) is 29/03/2016
Now playing Next USA Trump slams Iran and the UN while drawing fire from Clinton Republican presidential front runner Donald Trump vowed an unbreakable bond with Israel, slammed the nuclear deal with Iran and challenged the United 22/03/2016
Now playing Next USA Another Donald Trump rally, another protest turns violent The latest US presidential campaign meeting held by the Republican frontrunner in Tucson, Arizona was disrupted by two demonstrators, one of them a 20/03/2016
Now playing Next USA Anti-Trump protesters clash with police at Utah rally Donald Trump has said he believes he can secure enough backing to win the Republican US presidential nomination outright – and avoid a difficult 19/03/2016
Now playing Next USA Trump and Clinton pave the way to the White House More than 14 million votes were cast across five states in the so-called "Super Tuesday II" 16/03/2016
Now playing Next USA Is it too late to stop the Donald Trump machine? Trump has a good night at what was dubbed Super Tuesday II, despite defeat in Ohio 16/03/2016
Now playing Next USA Rubio quits as the Trump campaign machine keeps rolling Republican Donald Trump scored a big win in the Florida primary as projections gave him at least three of the five states in the second Super Tuesday 16/03/2016
Now playing Next USA Voting begins in second Super Tuesday of US presidential primaries Voting is taking place in five US states in the second so-called Super Tuesday of primaries for November's presidential election 16/03/2016