Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE's campaign co-chairman says Republicans should either unite behind their party's presumptive presidential nominee or shut up.

"The leadership of the Republican Party needs to figure out what they want," Sam Clovis said Thursday on CNN.

ADVERTISEMENT

"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."

Trump on Wednesday urged GOP leaders to "be quiet," saying they are holding him back.

“You know the Republicans — honestly folks, our leaders have to get tougher,” he said at a rally in Atlanta. “This is too tough to do it alone, but you know what? I think I’m going to be forced to.”

“Our leaders have to get a lot tougher,” he continued. “And be quiet. Just please be quiet. Don’t talk. Please be quiet. Just be quiet, to the leaders, because they have to get tougher, they have to get sharper, they have to get smarter. We have to have our Republicans either stick together or let me just do it by myself.”

At the same time, Republican leaders have appeared increasingly worried about being aligned with Trump's campaign.

Some have refused to answer questions about Trump in the recent days, with Sen. John Cornyn John CornynCalls grow for Biden to expand election map in final sprint Bipartisan praise pours in after Ginsburg's death Chamber of Commerce endorses McSally for reelection MORE (R-Texas) going so far as to say he won't discuss the candidate until after the presidential election.