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.
