Kasich quits Republican race

A day after Cruz threw in the towel, John Kasich follows suit. Trump is not officially the Republican nominee--the Republican convention this summer is when he will be anointed (or somehow shivved) by the party--but this leaves him without a campaigning rival.

Mr Kasich's announcement clears Mr Trump's path, although he was never a significant threat and only won his home state.Earlier on Wednesday, he had released a Star-Wars themed advert describing himself as the "only hope" against Donald Trump.