Donald Trump's policy adviser delivered a stern rebuke to Republicans still moaning about the billionaire real-estate tycoon and his controversial platform: Get on board or "just shut the hell up."
Sam Clovis, who also serves as the co-chairman of Trump's presidential campaign, told
CNN's "New Day" on Thursday that the Republican National Committee has to "figure out what they want."
"Either they want to get behind the presumptive nominee — who will be the nominee of this party — and make sure that we do everything we can to win in November, or we're just asking them if they can't do that then just shut the hell up," Clovis said.
He noted the Trump campaign has been in a non-stop war with the establishment.
"We've run against the establishment. We've had to fight the establishment, the establishment has come in and outspent us," Clovis said. "The establishment has control of the media, a lot of these other issues and some of us have been successful, others not so much."
His remarks come amid continued resistance to Trump being anointed the party's nominee at the upcoming Republican convention.
Two sitting governors, Larry Hogan of Maryland and Charlie Baker of Massachusetts, have already said they won't vote for him, and GOP heavyweights have yet to endorse him.
Further, party heavyweights such as Sen. Lindsey Graham of South Carolina and two-time presidential candidate and former Massachusetts Gov. Mitt Romney continue to blast him.
There are also reports of a feverish, behind-the-scenes effort to find a third-party candidate to disrupt Trump's chances of winning the general election.
Clovis has fired similar missives before in an effort to push the fence-straddling GOP into the Trump camp.
In March, he told CNN the party had to "Get on the train or … end up under the train.''
Among Trump's proposed policies that some Republicans take issue with are his plan to temporarily ban Muslims from entering the United States and make Mexico pay to build a wall along the US-Mexico border.
He has also been under fire for doubting whether a US-born federal judge could preside over a lawsuit involving his now-defunct Trump University because he's "a Mexican," and for referring to Massachusetts Sen. Elizabeth Warren as "Pocahontas."