The GOP will back its presidential nominee “110 percent,” the chairman of the Republican National Committee says, regardless of whether it's Donald TrumpDonald John TrumpUS-Saudi Arabia policy needs a dose of 'realpolitik' Trump talks to Swedish leader about rapper A$AP Rocky, offers to vouch for his bail Matt Gaetz ahead of Mueller hearing: 'We are going to reelect the president' MORE or someone else.

“I talk to all of our leaders in our party. Everyone is going to get behind whoever the winner is,” Reince PriebusReinhold (Reince) Richard PriebusTrump's no racist — he's an equal opportunity offender Press: Acosta, latest to walk the plank Author: Paul Ryan saw retirement as an 'escape hatch' from Trump MORE said on Fox News’s “Hannity." "We have 12 great candidates. We’ve got a varsity squad out on the field.

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“It’s very difficult to make a decision, because we have got real serious players that are vying for the nomination of our party,” he said.

“Whoever the delegates of the party choose, that is going to be the nominee, and our party is going to be behind that person 110 percent to save this country.”

Priebus said his role as RNC chairman is to ensure that the nominee has the resources needed to win the White House.

“The unifying thing about what I have to do is that no matter who you’re for, everyone can agree that we have to have a national party infrastructure that has its act together,” he said. "Once we get a nominee, what is that nominee going to plug into?

“We have to be a whole lot better than we were in 2012 if we’re going to win in 2016, and that’s what this is about.”

Republicans have one of their most crowded presidential fields in recent memory with 12 candidates. Trump is firmly in the lead in national polls and in the first primary state of New Hampshire.