Peter B. Lewis -- the billionaire chairman of Progressive Corp. and well-known medical marijuana advocate -- is seeking proposals to run a campaign to legalize medical marijuana in Ohio. The issue would go on the ballot in 2012. While Democratic lawmakers have tried and failed in recent years to pass medical a marijuana law in Ohio, Lewis' latest inquiry represents a different tack. By going directly to voters through a ballot initiative, Lewis and his supporters could circumvent a GOP-controlled legislature and a Republican governor who likely would oppose such a law.