MARKHAM, Ont. - Premier Dalton McGuinty says he's running a `positive campaign' and would never have approved an attack ad like the latest one released by Progressive Conservative rival John Tory.

In it, the Conservatives slam McGuinty for mismanaging health care, suing the parents of autistic children, wasting tax dollars on `Liberal insiders' and ultimately asks whether the public wants `four more years' of the same.

McGuinty says he first caught the ad while watching Saturday's hockey game with his son Liam and says his first thought was that it was not the approach he would take.

He says he was raised to always focus on the positives and in this campaign, that means what his government has done to reduce medical wait times and strengthen public schools where teachers haven't been on strike in four years.

He deflected criticism that while his mainstream media ads may be positive, those on YouTube and other websites have been anything but.

McGuinty says there's `only so much he can manage' but that he's the one giving direction when it comes to newspaper, radio and TV ads.