This is a nonsense attitude. If you vote for a party, then you 're acknowledging that you want them in power. If you don't want them, stop voting for them. Sure, your action won't get a 3rd party elected, but neither will your incumbent vote be needed for the incumbent to stay in power. It's just a psychological illusion of "voting for the winner" and not "wasting" it that drives people to oppose their own interests. Within the past 20 years there have been several 3rd parties with some chance, but enough of their supporters decided not to "waste" their vote that none of them ever made it.