A Fordham University study ranked 28 polling firms on how their pre-election national surveys compared to the results on Election Day. The ranking:
1. PPP (D)
1. Daily Kos/SEIU/PPP
3. YouGov
4. Ipsos/Reuters
5. Purple Strategies
6. NBC/WSJ
6. CBS/NYT
6. YouGov/Economist
9. UPI/CVOTER
10. IBD/TIPP
11. Angus-Reid
12. ABC/WP
13. Pew Research
13. Hartford Courant/UConn
15. CNN/ORC
15. Monmouth/SurveyUSA
15. Politico/GWU/Battleground
15. FOX News
15. Washington Times/JZ Analytics
15. Newsmax/JZ Analytics
15. American Research Group
15. Gravis Marketing
23. Democracy Corps (D)
24. Rasmussen
24. Gallup
26. NPR
27. National Journal
28. AP/GfK