swing voter

swing voter (plural swing voters)

1. A person who does not always vote for the same political party, but usually decides on the basis of specific policies.

   Synonym: floating voter

   • 2023 August 8, Janan Ganesh, “The oneness of Ron DeSantis and Rishi Sunak”, in Financial Times‎:

     As long as a conservative politician doesn’t break the law, or threaten the constitutional order, they can get away with more strident policies and rhetoric than a swing voter might have tolerated a decade ago.