Floaters

noun

1. Agent noun of float; one who or that which floats.
2. An employee of a company who does not have fixed tasks to do but fills in wherever needed, usually when someone else is away.
3. An unaffiliated player.
4. A voter who shifts from party to party, especially one whose vote can be purchased.
5. A person, such as a delegate to a convention or a member of a legislature, who represents an irregular constituency, such as one formed by a union of the voters of two counties neither of which has a number sufficient to be allowed a (or an extra) representative of its own.