PHILADELPHIA - Former Pennsylvania Gov. Ed Rendell is criticizing a TV ad run by Democratic gubernatorial candidate Rob McCord.

Rendell, who has not endorsed any candidate, says the ad that makes racially-charged accusations against front-runner Tom Wolf is one of the worst he's seen, and is the kind of thing that keeps voters at home on election day.

Rendell says it's wrong for McCord to claim that Wolf is insensitive to racism, and noted that McCord accepted a $20,000 campaign donation from Wolf in 2008. Rendell says he now wonders if McCord will return that donation.

McCord has scheduled a press conference to respond to Rendell's remarks.