HARRISBURG — State Sen. Anthony Hardy Williams is airing the first negative TV ad of Pennsylvania's gubernatorial campaign, and it's aimed at Allegheny County Executive Dan Onorato.

Williams' campaign said the commercial began airing Monday in markets that include Pittsburgh.

The ad attacks Onorato's claim that he has kept county unemployment low and accuses him of breaking faith with constituents by increasing fines and fees as well as imposing a new tax on alcoholic drinks.

Onorato's campaign calls the ad misleading. It cites Williams' votes to increase his pay and his pension in the Legislature as evidence that he is against reforming state government.