Donald Trump urges John Kasich to quit White House race

Republican presidential front-runner Donald Trump is calling on rival John Kasich to get out of the White House race, arguing that the Ohio governor should not be allowed to collect future delegates because the nomination is already beyond his grasp.

Trying hard to get back on track after a difficult week, Mr Trump said it was unfair for Mr Kasich, the winner of only his home state's primary, to continue campaigning.