So, you start at a 47-39 lead by the Republican Bunning, then take note of the poll showing that undecideds have a 12% favorable rating for Bunning & a 41% unfavorable rating for the Republican, and your looking at a ~5 percent contest. Mongiardo(D) got a late jump onto TV, and Bunning(R) got an early start, outspending Mongiardo 4:1 thus far, but things are more equal now, and this race is still on the DSCC's radar.

It would help if there are Democratic incumbent Senators that are not being as hotly challenged, in order to free up the cash from those cases of defense. There was a recent report that the NRSC had cancelled over $1-2M of ad buys they had reserved in Seattle, for Nethercutt's challenge against the Democratic incumbent Patty Murray; and Barbara Boxer looks unbeatable in California. Only Tom Daschle looks seriously challenged, and god knows, he has enough money for SD's markets by now. Feingold 'might' need some late attention, but not yet; and so, it's on to offense for the DSCC. Kentucky & Pennsylvania, those are two Republican incumbents (Bunning & Specter) whose hides have come onto the Democrats radar this week.