unpledged elector
nominated elector in a U.S. presidential election who has not pledged to support any particular candidate
en-US/ənˈplɛd͡ʒd ɪˈlɛktɚ/
en-GB/ʌnplɛd͡ʒd ɪˈlɛktə/
nominated elector in a U.S. presidential election who has not pledged to support any particular candidate