Does Democratic Senatorial Campaign Committee chairman Bob Menendez, D, know something we don’t? The DSCC just paid $12,500 today to cut a new ad against Delaware’s longshot Republican nominee for Senate, Christine O’Donnell. They haven’t reported purchasing any airtime yet for this new ad, but they’ve already spent about $283,000 on the race.

Meanwhile, the DSCC also cut a slightly more expensive ($14,500) ad against Ken Buck, the Republicans’ Senate nominee in Colorado.

Beltway Confidentialchristine o'donnellelection 2010US