General Resources:
The Candidates:
The Democrats:
Barack Obama
The former lawyer and state senator won a U.S. Senate seat in Illinois in 2004.
Hillary Clinton
The former first lady is now in her second term as the junior senator from New York.
John Edwards
The former U.S. senator from North Carolina was the Democratic 2004 vice presidential candidate.
Bill Richardson
The New Mexico governor has also served in the U.S. House and as U.N. ambassador and U.S. energy secretary.
Dennis Kucinich
Kucinich represents an Ohio district in the U.S. House and also ran for the '04 Democratic presidential nomination.
The Republicans:
John McCain
The U.S. senator from Arizona ran for the GOP presidential nomination in 2000, but lost to George W. Bush.
Mitt Romney
The former Massachusetts governor made an unsuccessful run for the U.S. Senate in 1994.
Mike Huckabee
Before he was a governor of Arkansas, Huckabee served as pastor to several churches.
Rudy Giuliani
The two-term mayor of New York City once ran for the U.S. Senate, but dropped out in 2000.
Ron Paul
The U.S. House member from Texas and medical doctor ran as a Libertarian for president in 1988.
Fred Thompson
The former U.S. senator from Tennessee also is known for acting, including his "Law and Order" role.