Are political centrists in America without a political home? Do we need a third-party presidential candidate to represent those socially progressive, fiscally austere voters who find our two parties too extreme?

There's no disputing that the Republican Party continues to move rightward at warp speed. Virtually every GOP elected official who's been in office for more than a couple of years has had to repudiate previously mainstream Republican positions (such as creating a health insurance system with an individual mandate, an idea cooked up by a right-wing think tank) to keep today's more rabid Republican activists from challenging them in party primaries or caucuses. Such longtime conservative stalwarts as Sens. Orrin Hatch of Utah and Richard Lugar of Indiana could lose their party's renomination this spring from just such challenges.

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