A year before the first primary votes are cast, the 2008 presidential field is already growing crowded.

Democrats Officially in the Race

Former North Carolina Sen. John Edwards

Connecticut Sen. Chris Dodd

Iowa Gov. Tom Vilsack

Ohio Rep. Dennis Kucinich

Democratic former Alaska Sen. Mike Gravel

Potential Democratic Candidates

Delaware Sen. Joe Biden (Has said he will run, but has not yet filed paperwork with the Federal Election Commission)

Retired Gen. Wesley Clark

New York Sen. Hillary Rodham Clinton

Former Vice President Al Gore

Massachusetts Sen. John Kerry

Illinois Sen. Barack Obama

New Mexico Gov. Bill Richardson

The Rev. Al Sharpton

Republicans Who Have Created Exploratory Committees

Kansas Sen. Sam Brownback

Former Viginia Gov. Jim Gilmore

Former New York City Mayor Rudy Giuliani

Arizona Sen. John McCain

Former Massachusetts Gov. Mitt Romney

Former Wisconsin Gov. Tommy Thompson

Other Potential Republican Candidates:

New York Mayor Mike Bloomberg (also a potential independent candidate)

Former House Speaker Newt Gingrich

Nebraska Sen. Chuck Hagel

Former Arkansas Gov. Mike Huckabee

California Rep. Duncan Hunter (said he would seek presidency on Oct. 30, 2006, but has not filed papers establishing exploratory committee)

Former Oklahoma Gov. Frank Keating

Former New York Gov. George Pataki