tactical voting
strategically voting for other than one's true preference, based on knowledge of the voting system
en-GB/ˈtæktɪkəl ˈvəʊtɪŋ/
en-US/ˈtæktɪkəl ˈvoʊtɪŋ/
strategically voting for other than one's true preference, based on knowledge of the voting system