In addition to a number of districts long thought to be in play, the ads target Reps. Bruce Braley (D-Iowa), Dave Loebsack (D-Iowa) and Nick Rahall (D-W.Va.), three survivors of the 2010 GOP wave who have looked to have easier paths to reelection this year.
The ads hit on a number of district-specific messages, though a number focus on Medicare, accusing Democrats of cutting billions from the program because they supported the Democratic health insurance overhaul law. A number also attack Democratic incumbents in conservative-leaning areas as "disappointments" who sided with their party on key votes, a message that seeks to undercut their ability to outperform President Obama in their districts this fall.
The spots come in the wake of a major ad campaign last week from the Democratic Congressional Campaign Committee.
Watch the Medicare-themed ad against Braley above.