Republican Party Presidential Candidates (Wikipedia)

Republican Party Presidential Candidates

Candidates who have filed with the FEC for the Republican Party
Senator Sam Brownback of Kansas (Campaign Site)
John H. Cox of Illinois (Campaign Site)
Former New York City Mayor Rudy Giuliani of New York (Exploratory Committee)
Representative Duncan Hunter of California (Campaign Site)
Former Governor Mitt Romney of Massachusetts (Campaign Site)
Michael Charles Smith of Oregon (Campaign Site)

Candidates who have formed exploratory committees, but not yet filed with the FEC
Former Governor Jim Gilmore of Virginia
Former Governor Mike Huckabee of Arkansas (Exploratory Committee)
Senator John McCain of Arizona (Exploratory Committee)
Representative Ron Paul of Texas (Exploratory Committee)
Representative Tom Tancredo of Colorado (Exploratory Committee)
Former Governor Tommy Thompson of Wisconsin (Exploratory Committee)

Candidates who have expressed serious interest
Former House Speaker Newt Gingrich of Georgia (Winning the Future)
Senator Chuck Hagel of Nebraska (Sandhills PAC)
Radio talk show host Michael Savage of California (Savage Nation)

source: http://en.wikipedia.org/wiki/United_States_presidential_election,_2008 date discovered: 2/15/2008