Rep. Tim Holden (D-Pa.) is out with a new ad slamming his primary opponent for donating to corrupt judges.

"Lawyer Matt Cartwright and his firm contributed thousands of dollars to the campaigns of Luzerne County judges who were convicted in the 'Kids for Cash' scandal — judges who took millions in bribes to send juvenile offenders to private jails,” says the ad's narrator.

Holden, a longtime centrist congressman who voted against Democrats' health insurance reform law, is locked in a tough primary against Cartwright, who has run to his left. Cartwright has already been on the air attacking him.

The two will face off in the state's April 24 primary.

Watch the ad here: