House Speaker Paul Ryan refuses to endorse Trump, saying presumptive presidential nominee must do more to unite party.

The Republican Party is facing a divide, with party leader Paul Ryan refusing to support Donald Trump as the party's presidential nominee, insisting that the businessman must do more to unite the party.

Appearing on CNN's show The Lead, Ryan, the speaker of the House of Representatives, said on Thursday that many Republicans wanted to see "a standard-bearer who bears our standards" and "unifies all the wings of the Republican Party".

"I'm just not ready to do that at this point. I'm not there right now," the Wisconsin Republican said.

Al Jazeera's Kimberly Halkett, reporting from Washington DC, said "Ryan has been asked on national TV whether or not there were concerns about the policy proposals put forward by Donald Trump to not allow Muslims to enter United States, at least temporarily, also to deport illegal immigrants."

"Paul Ryan simply said there is a lot of work that needs to be done," she said.

Donald Trump, since becoming the presumptive Republican nominee has been quietly reaching out to the members of the Republican Party, in an attempt to try and unite the party.

"But he has been receiving a less than warm reception," said Halkett, "Paul Ryan basically said on national TV that he is not ready to support Donald Trump."

 Aljazeera