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.

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

Fox News has blasted Republican candidate Donald Trump over his "sick obsession" with female anchor Megyn Kelly.

As Donald Trump basked in the glow of victories, he gave a shout-out to embattled campaign manager Corey Lewandowski, positioned at his right hand.

Brazil's Lower House of Congress has launched impeachment proceedings against President Dilma Rousseff after thousands of Brazilians took to the streets.

A secretive group of Republican operatives and conservative leaders convened for more than three hours to discuss ways to unite the right against Donald Trump.

Clinton is likely to become the first major-party female presidential nominee of our times, and happens to be running when women are ruling comedy.

The warning was issued by the London-based Economist Intelligence Unit, which put a Trump presidency in sixth place among the top 10 risks facing the world.

COMMENT: I bet every Western leader was privately impressed with Putin's tactical agility.

A criminal complaint of alleged battery was filed against Lewandowski last week by Michelle Fields who says he assaulted her as she tried to ask a question.

Russian President Vladimir Putin, with his sudden move to withdraw Russian forces from Syria, once more caught international observers by surprise.

COMMENT: With presidential race and border crossings turned into lucrative TV, issues of office solve themselves, writes Jerry Flay.

Here are official and unofficial spokespeople who help fuel the fire for Trump on TV.

Republican front-runner shares a photo of a baseball signed by Ohio legend Pete Rose. But now it turns out that what some thought was an endorsement wasn't.

COMMENT: Trump has turned the entire political world upside down, he's turned it into a sideshow of stylised violence, writes John Dybvig.

Husband of former vice-presidential candidate Sarah Palin hospitalised after a "very serious" snowmobile accident.

Iran's Foreign Minister talks with Murray McCully kicked off with some small talk about Zarif's plane and an offer for Mr McCully to visit Tehran in May.

An already ugly campaign has descended to a new level. The question now is whether it is possible to contain what Trump has unleashed across the country.

COMMENT: The man who is taking charge of everything, President Xi Jinping, is now turning into the first one-man regime since Deng Xiaoping in the 1980s.

Germany's Chancellor was not only absent from the election rally for the party she leads - she wasn't invited.

"Fantasy and schoolyard taunts" - The President of the United States says the Republican Party is getting what it asked for.

Ohio governor blames Republican rival for clashes in Chicago and elsewhere between Trump supporters and protesters.