The campaign manager for presumptive Republican presidential candidate Donald Trump is to leave his job.

US House Speaker Paul Ryan says he will vote for the Republican presidential candidate Donald Trump in this year's election, despite their differences.

Supporters and opponents of Republican presidential nominee Donald Trump clashes in the city of San Diego in California.

Republican presidential candidate Donald Trump appears to have softened his stance on temporarily barring Muslims from travelling to the US.

This is the season of lies. We watch with fascination as candidates for the world's most powerful job trade falsehoods and allegations of dishonesty.

For Americans of nearly every race, gender, political persuasion and location, disdain for Donald Trump runs deep, saddling the Republican front-runner with unprecedented unpopularity as he tries to overcome recent campaign setbacks.

President Barack Obama has opened his final presidential campaign — against Donald Trump.

Presidential candidate Donald Trump briefly called for "some form of punishment" for women who have abortions, if it became illegal.

Some people run simply out of ego or greed. The publicity that attends a presidential bid can garner even a failed candidate a book contract, a television gig, or a well-paid speaking career (or perhaps all three). Trump ran on the basis of his celebrity.

Donald Trump calls off a rally in Chicago after protests against the Republican presidential front-runner led to violent clashes.

The Grand Old Party does not know how to stop Trump and it is their fault. Throughout history it's a party that has won elections mostly on anti-government rhetoric.

Donald Trump, the US real estate tycoon-turned-presidential candidate, topped himself not so long ago - no mean achievement - by outraging the entire world with his demand to ban the entry of Muslims into the US.

The Somali Islamist group al-Shabab releases a propaganda video featuring footage of the US presidential hopeful, Donald Trump

Malala Yousafzai condemns a call by US presidential hopeful Donald Trump to ban Muslims from entering the US.

The first military plane carrying Syrian refugees to be resettled in Canada has arrived in the country.

Donald Trump's anti-Muslim rhetoric undermines US national security by boosting the Islamic State (IS) group, the Pentagon warns.

Critics from the Republican Party and beyond reject presidential candidate Donald Trump’s call for a “total and complete” halt to Muslims entering the US.

Republican presidential candidate Donald Trump's plan to deport 11 million illegal immigrants has been savaged by his rivals in a TV debate.

Carson's attack on President Obama is akin to a slave praising slavery. Because Carson is doing the Republican base's dirty work, he is being consistently rewarded with a second place finish in the polls.

Jeb Bush fires back at Republican presidential candidate Donald Trump who slammed George W Bush over the September 11, 2001 attacks that brought down the World Trade Center.