Also there was the gift that keeps on giving; the Democrat candidates proclivity to the Todd Aiken disease. That is the inevitability of a candidate to say something stupid that is used against them in a campaign ad. Conversely, the Republicans seemed to have learned from their past mistakes of moving gaffe-prone candidates into the limelight.
In an effort to avoid any Todd Aiken-like gaffes, the National Republican Senatorial Committee put on a media-training bootcamp for candidates ahead of the midterms. NRSC trackers met the candidates at the airport, watching them as "soon as they poked their heads through the security doors." Then, it was two full days of training.