1. Virginia (OPEN SEAT- John Warner)
Challenger: Mark Warner
Primary winner: Barack Obama
Margin: Obama +29%
2002 Margin: GOP ran unopposed
2. New Hampshire (John Sununu)
Challenger: Jeanne Shaheen
Primary winner: Hillary Clinton (Barack Obama split the delegates here 9-9)
Margin: Clinton +3%
2002 Margin: GOP +4%
3. New Mexico (OPEN SEAT- Pete Domenici)
Challenger: Tom Udall
Caucus winner: Hillary Clinton
Margin: Clinton +1%
2002 Margin: GOP +30
4. Minnesota (Norm Coleman)
Challenger: Al Franken
Caucus winner: Barack Obama
Margin: Obama +34%
2002 Margin: GOP +3
5. Colorado (OPEN SEAT- Wayne Allard)
Challenger: Mark Udall
Caucus winner: Barack Obama
Margin: Obama +35%
2002 Margin: GOP +5
6. Oregon (Gordon Smith)
Challenger: Jeff Merkley
Primary winner: May 20th
Margin:
2002 Margin: GOP +4%
7. Maine (Susan Collins)
Challenger: Tom Allen
Caucus winner: Barack Obama
Margin: Obama +19%
2002 Margin: GOP +18
8. Alaska (Ted Stevens)
Challenger: Mark Begich
Caucus winner: Barack Obama
Margin: Obama +49%
2002 Margin: GOP +69
9. North Carolina (Elizabeth Dole)
Challenger(s): Kay Hagan or Jim Neal
Primary winner: May 6th
Margin:
2002 Margin: GOP +9%
10. Nebraska (OPEN SEAT- Chuck Hagel)
Challenger: Tony Raimando
Caucus winner: Barack Obama
Margin: Obama +34%
2002 Margin: GOP +69
11. Texas (John Cornyn)
Challenger: Rick Noriega
Primary/Caucus winner: March 4th
Margin:
2002 Margin: GOP +12
12. Oklahoma (James Inhofe)
Challenger: Andrew Rice
Primary Winner: Hillary Clinton
Margin: Clinton +24%
2002 Margin: GOP +30%
13. Idaho (OPEN SEAT- Larry Craig)
Challenger: Larry LaRocco
Caucus winner: Barack Obama
Margin: Obama +63%
2002 Margin: GOP +32
14. Kentucky (Mitch McConnell)
Challenger(s): Greg Fischer or Bruce Lunsford
Primary winner: May 20th
Margin:
2002 Margin: GOP +28
15. Mississippi (Roger Wicker/Trent Lott)
Challenger: Ronnie Musgrove
Primary winner: March 10th
Margin:
2006 Margin: GOP +29%
16. Alabama (Jeff Sessions)
Challenger: Vivian Figures
Primary winner: Barack Obama
Margin: Obama +14%
2002 Margin: GOP +19
17. Kansas (Pat Roberts)
Challenger: Lee Jones
Primary winner: Barack Obama
Margin: Obama +49%
2002 Margin: GOP ran unopposed
18. Tennessee (Lamar Alexander)
Challenger: Chris Lugo
Primary Winner: Hillary Clinton
Margin: Clinton +13%
2002 Margin: GOP +10%
19. Georgia (Saxby Chambliss)
Challenger(s): several, none strong.
Primary winner: Barack Obama
Margin: Obama +35%
2002 Margin: GOP +7
20. South Carolina (Lindsey Graham)
Challenger: none
Primary winner: Barack Obama
Margin: Obama +28%
2002 Margin: GOP +10%
21. Mississippi (Thad Cochran)
Challenger: Erik Fleming
Primary winner: March 10th
Margin:
2002 Margin: GOP ran unopposed
22. Wyoming (Mike Barrasso)
Challenger: none
Caucus winner: March 8th
Margin:
2006: GOP +40%
23. Wyoming (Mike Enzi)
Challenger: none
Caucus winner: March 8th
Margin:
2002: GOP +47%
