Trump finds no support from US House Speaker Paul Ryan

Paul Ryan sent out a clear message to Trump – in order to unify the party, you've got to tone it down!

"I'm just not ready to do that at this point. I'm not there right now," said the highest-ranked elected Republican calling for Mr Trump to do more to adhere to conservative principles.

An hour later, Trump responded by saying: "I am not ready to support Speaker Ryan's agenda. Perhaps in the future we can work together."

In explaining his refusal to back Mr Trump, he said: "I think what a lot of Republicans want to see is that we have a standard bearer that bears our standards."

Former presidents George W Bush and George H W Bush said on Thursday they would not endorse the controversial presumptive nominee.

Both Bushs, plus former nominees Romney and Senator John McCain, have said they will not go to the party convention in July when Trump will be formally confirmed.

Several of Trump’s appearances have seen protestors, with particular focus on his plan to build a wall on the Mexican border and deport 11 million undocumented immigrants.