Priebus: Third-party bid guarantees Clinton win
© Greg Nash
"The amount of time, energy, money, and also it's a guarantee to elect Hillary Clinton. When people start to take a breath and let some of this calm down, people will understand not to let differences in choices” jeopardize the party, Priebus said at a Politico breakfast event. 
Sen. Ben Sasse (R-Neb.) called for an "adult" third-party candidate for conservatives to back, while House Speaker Paul RyanPaul Davis RyanOn The Trail: Retirements offer window into House Democratic mood Stopping the next insurrection Former Sen. Bob Dole dies at 98 MORE (R-Wis.) said Thursday that Trump had not yet earned his support. 
Trump needs to make concrete efforts to help the party coalesce around his candidacy, Priebus said Friday.
"A smart thing for Donald Trump to do would be to release five to 10 names of people he would pool from to say, 'Here's 10 folks that I think would make great Supreme Court justices,'" he said. 
"Things like that would be helpful in recalibrating some minds."
Trump has promised to release a list of potential Supreme Court picks, but he has not yet done so.