A large group of contenders are already putting together campaign operations and visiting the early primary states: Democrats: Biden, Clinton, Dodd, Edwards, Gore, Gravel, Kucinich, Obama, Richardson Republicans: Brownback, Gilmore III, Gingrich, Giuliani, Hagel, Huckabee, Hunter, McCain, Pataki, Paul, Romney, Tancredo, Thompson, F., Thompson, T. Full Coverage: The Presidential Field | Graphic: Primary Calendar