In terms of registered members, the Constitution Party is the third-largest political party in the U.S., behind the Democratic and Republican parties.World Net Daily: Constitution Party vets tap Corsi for president (May 17, 2007) Ideologically, the Constitution party is on the far right wing of the spectrum, in favor of states' rights, gun rights and property rights, and opposed to income tax, abortion and illegal immigration. Official Site: Constitution Party National Platform