Cyber attackers are targeting the campaigns of Democratic and Republican presidential contenders, US Director of National Intelligence James Clapper said Wednesday.

Republican presidential front-runner Donald Trump accuses China of "raping" the US, in renewed criticism of China's trade policy.

Ted Cruz nails down all 14 delegates up for grabs at the Republican Party convention in Wyoming.

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.

Ben Carson, the Republican US presidential candidate, will not take back his comment in a recent interview that a Muslim should not be president, Carson's business manager says.