floating voter(n = noun.person) swing voter - a voter who has no allegiance to any political party and whose unpredictable decisions can swing the outcome of an election one way or the other;
is a kind of elector, voter

crossover voter, floating, floating bridge, floating charge, floating dock, floating dry dock, floating fern, floating mine, floating policy, million floating point operations per second, swing voter, trillion floating point operations per second, voter, voter turnout