[Diddle E. Squat]

Yes, but by how much, and given the dynamics of these races, does it favor one party or another?

My guess is that it will have very little impact on the actual vote percentages. Too many broken-glass conservatives versus a strong GOTV that is in place rain or shine.

[Diddle E. Squat]

To be clearer, rain might depress turnout a bit, but won't have much impact on the percentage of votes for Democrats vs. Republicans.

[Brices Crossroads]

The weather makes a significant difference. It can depress Democrat turnout by 10-15%. When you are canvassing a public housing project trying to get people to go to the polls, try convincing them when there is a driving rain storm going on. Republicans on the other hand tend to vote regardless. This is just a fact. If it costs the Democrats only 2-3% in some of the close races (Georgia, North Carolina, even Arkansas, if it's close enough) you could see a real earthquake. In Louisiana, I will flatly predict that the rainy weather on Tuesday will make it IMPOSSIBLE for Mary Landrieu to avoid a runoff.