In the last two days Mason-Dixon and Gallup have released a host of Senate polls. In some critical battleground states for the Senate they have shown quite divergent results and it is instructive to go back and look at how these respective polling organizations did in the key battleground states in 2004 in their final election eve polls.

2004
Ohio
Gallup: Kerry +4
Mason-Dixon: Bush +2
Final Results: Bush +2

Pennsylvania
Gallup: Bush +4
Mason-Dixon: Kerry +2
Final Results: Kerry +3

Florida
Gallup: Kerry +3
Mason-Dixon: Bush +4
Final Results: Bush +5

2006
Montana
Gallup: Tester +9
Mason-Dixon: Tied
Final Results: ???

Virginia
Gallup: Allen +3
Mason-Dixon: Webb +1
Final Results: ???

Tennessee
Gallup: Corker +3
Mason-Dixon: Corker +12
Final Results: ???

So, I would take the Gallup state polls with a grain of salt. In RCP's opinion Burns is within 1-2 points with considerable momentum in Montana, Allen and Webb are knotted in a dead heat with Webb having the slight edge and Corker is more likely to win by 10 in Tennessee than lose.