US ELECTION

US president says he wants to 'bury last remnant of Cold War' hostility in historic speech in Havana.

Voters will head to the polls in Arizona and caucuses in Idaho and Utah.

Hacktivist group claims to have trapped US law enforcement agencies and Trump as part of elaborate experiment.

The Democratic senator said the US 'can't elect wannabe tyrants to the White House. Not now, not ever.'

Rick Perry and Tom Coburn among names suggested for third-party run in November election.

Republicans will face off in Arizona and Utah, while Democrats battle it out in all three states.

Corey Lewandowski was filmed as he appeared to grab a protestor by the collar at a rally in Arizona.

The hackers also sent out a threat to Democratic frontrunner Hillary Clinton, pledging '#TotalAnarchy'.

The Missouri primaries were highly contested with Republican race outcome yet to be announced.

Joe Scarborough's comment directed at Clinton to 'smile' led to the hashtag #SmileForJoe.

Party frontrunner warns that 'bad things would happen' if he was blocked for a mere 100 delegates.

Donald Trump's vocabulary is on the same level as a seventh grade student.

Cruz switches attention to Trump, but says Rubio ran "strong, optimistic, positive campaign".

Florida Senator Marco Rubio drops his presidential bid following a tough blow in his home state.

Trump and Kasich split winner-take-all states Florida and Ohio.

The Missouri primaries remained too close to call despite Clinton and Trump in the lead.

He said the country is in worse shape than before Saddam Hussein was overthrown.

"That must be a pretty picture, you dropping to your knees," Trump says in The Apprentice.

North Carolina officials are looking into whether to hit Trump with charges over rally violence.

Todd Palin has been hospitalised in a snowmobile accident.

DeVito, 5ft tall, joked about height behind Sanders' podium which obscured him.