NEW YORK - The presumptive Republican Presidential nominee, Donald Trump, said on Friday that he will meet next week with the House Speaker , Paul Ryan, in the wake of Ryan's comments that he is not yet prepared to back Trump, as the party remains split over the controversial utterances of the billionaire businessman.

Ryan's refusal is "not a good thing" and "something the party should get solved quickly," Trump said in a television interview, adding, that he was surprised by the Speaker's comments.

“I mean, he talks about unity, but what is this about unity?” Trump said. “With millions of people coming into the party, obviously I’m stating the right thing.”

Ryan said on Thursday he is not prepared to endorse Trump because of questions about his commitment to conservatism. Asked whether Trump’s proposed Muslim ban, his opposition to free trade and his call to deport 12 million undocumented immigrants would preclude him from ever supporting Trump, Ryan said: “We got work to do.”

Trump, who has built a huge following with an anti-establishment message, shot back at Ryan in a statement. "I am not ready to support Speaker Ryan's agenda. Perhaps in the future we can work together and come to an agreement about what is best for the American people," he said.

The Republican National Committee, under pressure to unify the party or face an electoral rout in the Nov. 8 election, said Ryan and Trump were expected to meet soon. It added that "only a united Republican Party will be able to beat Hillary Clinton."

"We respect Speaker Ryan’s opinion and believe that since the primary ended early we will have time to unify. We anticipate the two meeting soon to begin to help unite the party," RNC spokeswoman Lindsay Walters said.

Ryan’s comments were striking because Senate Majority Leader Mitch McConnell said on Wednesday night that he’d back Trump.

Neither of the last two Republican Presidents — George H.W. Bush and George W. Bush — will attend the Republican convention in Cleveland. Nor will the 2008 nominee, John McCain, or the 2012 nominee, Mitt Romney.

The House Speaker said he’d only started considering whether he’d support Trump after the real estate mogul won Indiana’s primary on Tuesday — knocking both Texas Sen. Ted Cruz and Ohio Governor John Kasich out of the race and ending the possibility of a contested convention.

“I thought about this two days ago. I thought, actually, this thing was going to go to June 7 at the very least — probably to a convention — and so this is all pretty new for us,” he said.

“The bulk of the burden on unifying the party will have to come from our presumptive nominee,” Ryan said. “I don’t want to underplay what he accomplished. … But he also inherits something very special, that’s very special to a lot of us. This is the party of Lincoln and Reagan and Jack Kemp. And we don’t always nominate a Lincoln or a Reagan every four years, but we hope that our nominee aspires to be Lincoln- or Reagan-esque — that that person advances the principles of our party and appeals to a wide, vast majority of Americans.”

He continued: “And so, I think what is necessary to make this work, for this to unify, is to actually take our principles and advance them. And that’s what we want to see. Stating we’re unified doesn’t in and of itself unify us, but actually taking the principles that we all believe in, showing that there’s a dedication to those, and running a principled campaign that Republicans can be proud about and that can actually appeal to a majority of Americans — that, to me, is what it takes to unify this party.”

Ryan has expressed misgivings about Trump’s campaign for months.

When Trump proposed indefinitely banning Muslims from the United States in December, Ryan responded that such a move is “not who we are as a party” and in violation of the Constitution.

“This is not conservatism,” he said then, adding, “Some of our best and biggest allies in this struggle and fight against radical Islam terror are Muslims.”