TORONTO - Premier Dalton McGuinty's image is noticeably absent in the latest campaign advertisement from Ontario's governing Liberals.

The 60-second TV spot, which will start airing tonight, features McGuinty's voice, although he's never identified.

The ad shows images of factory workers, firefighters and farmers as the unseen McGuinty asks what defines Ontario, and then answers with "the way we work together."

Liberal campaign co-chair Greg Sorbara denies the Liberals are trying to downplay McGuinty's image before the Oct. 6 election.

Sorbara says after eight years in office, the premier doesn't have to identify himself to Ontario voters.

The Liberals also say they aren't going to get into a bidding war with the Progressive Conservatives, who are promising to lower taxes and remove the harmonized sales tax from hydro and home heating bills.