caused chaos and was self-serving in his office. reporter: more than half of likely gop caucusgoers said their minds aren t made up, including murdoch. if someone has a good point, i m willing to hear other perspectives. but not if you re lling at me. reporter: and while the new poll showed 41% think the republican party should continue to be led by former president trump, whitey stang is not one of them. do you thk foiner president trump should be the leader of the republican party? no. not at all. why? i don t think he s trustworthy. reporter: stang, a father and grandfather, voted for mr. trump in 2016 and 2020 but says january 6th was a turning point for him. there s no doubt in my mind that he helped incite those people, that he did little to stop them. reporter: that s something mr. trump denies. anwhild stang says his top pick right now is former u.n. ambassador nikki haley, he could still change his mind. and for all their diffeners, these three iowa voters