JACKSONVILLE (Reuters) - Republican presidential candidate Donald Trump issued a warning to wavering Republicans saying "you have no choice", as he predicted there may be numerous vacancies on the Supreme Court.

"If you dislike me intensely, if you say I would never in a million years vote for Donald Trump, you have to," he said at a campaign rally in Jacksonville, Florida. "It could be that the next President will have three, four and maybe even five choices," he said.

His comments come against a backdrop of turmoil on Wednesday (Aug 3) after Mr Trump angered senior Republican Party leaders by criticising a dead soldier's family and refusing to back the re-election campaign of House of Representatives Speaker Paul Ryan.