Republican Utah Sen. Mitt Romney all but ruled out challenging President Trump in the upcoming presidential election and predicted the president will secure a second term.

"There is no circumstance I can conceive of, where I would run for national office," Romney said during a roundtable discussion about anti-vaping efforts, before adding that Trump will not only be the nominee, but will likely also win.

"There is no circumstance I can conceive of, where I would run for national office." - Romney.



He says Trump will almost certainly be the GOP nominee & is most likely to be re-elected. pic.twitter.com/MagM6rJUQt — KUTV 2News (@KUTV2News) October 10, 2019

"I've tried that twice. Twice is enough," he went on, Kathryn Watson of CBS News reported.

Romney says there's "no circumstance" he can conceive of in which he would run for national office again.



"I've tried that twice. Twice is enough." — Kathryn Watson (@kathrynw5) October 10, 2019

Trump and Romney have exchanged hostile words after Romney condemned him for encouraging Ukraine to investigate former Vice President Joe Biden. Trump fired back at Romney, calling him "pompous" and demanding his impeachment.

I’m hearing that the Great People of Utah are considering their vote for their Pompous Senator, Mitt Romney, to be a big mistake. I agree! He is a fool who is playing right into the hands of the Do Nothing Democrats! #IMPEACHMITTROMNEY — Donald J. Trump (@realDonaldTrump) October 5, 2019

"Oh, don't repeat them!" Romney said regarding the tweets. "First of all, I don't follow the president on Twitter so I don't see all of his tweets. But secondly, in my business if you got concerned about criticism, you'd be in the wrong business."