Most likely Iowa Republican caucusgoers say they have supported the same candidate throughout the entire election cycle, a contributing factor to former President Donald Trump’s maintaining a massive lead heading into Monday night.

But those who have changed their minds are largely shopping for an alternative to the GOP front-runner and could play a significant role in the race for second place.

According to the latest NBC News/Des Moines Register/Mediacom poll, 65% of likely GOP caucusgoers said they have supported their first-choice candidates through the whole campaign, while 27% said they at one time supported different candidates from the ones they plan to support Monday.

Several of the likely caucusgoers who’ve switched candidates told NBC News they once supported Trump but are now ready to move on, with former U.N. Ambassador Nikki Haley, Florida Gov. Ron DeSantis and entrepreneur Vivek Ramaswamy as their leading options.