Video exploring critical thinking and how it leads to great citizen involvement


Candidates who have withdrawn or who no longer meet our criteria.
Democratic PartyRepublican Party3rd Parties / Independents
Biden, Joe
(Withdrew on
Jan. 3, 2008)
Brownback, Sam
(Withdrew on
Oct. 19, 2007)
Gravel, Mike (Lib)
(Withdrew on
May 27, 2008)
Clinton, Hillary
(Suspended campaign on June 7, 2008)
Gilmore, Jim
(Withdrew on
July 14, 2007)
Imperato, Daniel (Ind)
(No longer met criteria
on Mar. 21, 2008)
Dodd, Chris
(Withdrew on
Jan. 3, 2008)
Giuliani, Rudy
(Withdrew on
Jan. 30, 2008)
Keyes, Alan (Ind)
(No longer met criteria
on June 23, 2008)
Edwards, John
(Withdrew on
Jan. 30, 2008)
Huckabee, Mike
(Withdrew on
Mar. 4, 2008)
Kubby, Steve (Lib)
(No longer met criteria
on Mar. 21, 2008)
Kucinich, Dennis
(Withdrew on
Jan. 25, 2008)
Hunter, Duncan
(Withdrew on
Jan. 19, 2008)
McEnulty, Frank (Ind)
(No longer met criteria
on Mar. 21, 2008)
Richardson, Bill
(Withdrew on
Jan. 10, 2008)
Paul, Ron
(Withdrew on
June 12, 2008)
Smith, Christine (Lib)
(No longer met criteria
on Mar. 21, 2008)
Vilsack, Tom
(Withdrew on
Feb. 23, 2007)
Romney, Mitt
(Withdrew on
Feb. 7, 2008)


Tancredo, Tom
(Withdrew on
Dec. 20, 2007)



Thompson, Fred
(Withdrew on
Jan. 22, 2008)



Thompson, Tommy
(Withdrew on
Aug. 12, 2007)
DONATE - Donate to ProCon.org - DONATE
Visit the ProCon.org community on:
Reprinting Policy | How to Cite ProCon.org | Media & Press | Donate to ProCon.org | Disclaimer | Privacy Policy

© 2020 ProCon/Encyclopaedia Britannica, Inc. | 325 N. LaSalle Street, Suite 200 | Chicago, Illinois 60654 USA | Tel: 312.347.7491