Donald Trump has begun wearing a bulletproof vest following threats and growing violence at rallies, according to sources close to his campaign.

Helen Clark's bid for the top job at the UN gets unanimous support from NZ.

The announcement at long last that Helen Clark is a candidate for the post of Secretary-General of the UN is one all NZers can greet with pride.

COMMENT: Few who know Clark would doubt her ability to do the job, and the fact that Clark will be in contention is an incredible achievement, writes Audrey Young.

COMMENT: We must stand up and tell those like Trump who support the cruel, debasing practice that it has no place in the modern world.

Republican front-runner calls himself the "Lone Ranger" and claims he can eliminate US national debt within 8 years in new revealing interview.

Cuba is also a more-than-safe place, with a rich cultural tradition and a unique social environment in constant transformation.

Christie insists he wasn't taken "hostage" by Trump.

COMMENT: In Washington DC, I was a diplomat for a day. I drove down wide boulevards where Secret Service agents paced in cargo pants and tactical vests.

The prospect of Donald Trump leading the GOP ticket this November is enough to send many Republicans into a defensive crouch/cower.

Both Clinton and Sanders are campaigning heavily in New York, marking the beginning of a potentially long slog through the state.

Prime Minister John Key has just attended a dinner hosted by President Barack Obama in the East Room of the White House.

Despite worldwide shock and indignation, it looks like little Aylan Kurdi's tragic death last summer changed little.

COMMENT: Why did our lame-stream media ignore the Key-Trump meeting? Outlets were quieter than an Eden Park rugby crowd on this astonishing encounter.

US President Barack Obama welcomes world leaders to Washington today for a summit on nuclear security.

Donald Trump came under fire this week for saying that women should be subject to "some sort of punishment" for undergoing illegal abortions.

None of the three remaining Republican presidential candidates would guarantee yesterday that they would support the eventual GOP nominee for president.

BARRY SOPER: If there's even a remote possibility of Clark slipping into the UN's Secretary-General role she'd be into it like a Queensland fruit fly.

COMMENT: West will never thwart each and every attack, but the power to undermine propaganda is in our hands.

United States President Barack Obama challenged Cuba's Communist Government with an impassioned call for democracy and economic reforms yesterday.

Donald Trump swept to victory in yesterday's primaries but rival Ted Cruz showed some fight with a win in Utah that gave hope to establishment Republicans.

Castro accuses US of double standards after Obama criticises human rights record.

Hit TV show Scandal is about to get more dramatic with the revelation of a character inspired by Donald Trump.

There seems little doubt that the beachhead US economic forces are re-establishing in Cuba will eventually lead to a new era of political freedom.

Donald Trump's success will rest on his white voters following his attacks on ethnic groups - and they might not be enough.

Cuban trip comes amid high anticipation and anxiety on the island.

US President Barack Obama says he and Cuban President Raul Castro had a "frank and candid conversation" on human rights and democracy, and are making progress in tearing down barriers between the two nations.

Democratic frontrunner Hillary Clinton and her allies have begun preparing a playbook to defeat Donald Trump in a general-election match-up.

COMMENT: He's a pouty-lipped liar but there is something about the guy. He's funny, has great one-liners and he's energised.

Mitt Romney is calling for republicans to join together in doing one thing - vote for Cruz and force an open convention.