Backers of the state constitutional amendment to allow a casino resort in southern Ohio say the argument that their tax liability could decrease to zero is false. "We will have the highest tax rate of any business in Ohio," said Rick Lertzman of MyOhioNow.com. He and his business partner, Dr. Bradford Pressman, formed a partnership to develop the casino resort in Clinton County. Pressman is a former podiatrist; Lertzman said he operated the family auction house and business liquidation firm. Their political action committee is based in Beachwood.