By Cameron Joseph - 03/13/12 03:16 PM EDT
Both ad buys are relatively small, around $70,000 apiece.
The two were thrown together in redistricting by a Republican gerrymander that eliminated Critz's district. Altmire has a geographic advantage, with much more of his old territory in the new district, but many unions have rallied to Critz. Whoever wins the primary will have a slight edge in the general election — the district is a toss-up — but both have shown the ability to win in tough districts.
The primary has at times been testy, with Critz pushing to disqualify Altmire from the ballot and both campaigns crying foul over the other's tactics, but the campaign ads start on a light note.
The primary is on April 24. The Hill rates the race as lean Democratic.