LITTLE ROCK, Ark. (AP) — Talk-show host Montel Williams is visiting Arkansas to campaign in favor of a ballot measure to legalize medical marijuana.Williams plans an appearance Thursday at the Capitol alongside members of Arkansans for Compassionate Care, which gathered signatures to place the measure on the November ballot.Williams suffers from multiple sclerosis and says he uses medical marijuana to treat symptoms of his condition.The measure would allow patients with qualifying conditions to buy marijuana from nonprofit dispensaries with a doctor's recommendation. If approved, Arkansas would become the first Southern state to legalize medical marijuana.The Arkansas Supreme Court upheld the proposal last month after a coalition of conservative groups asked the court to block the proposal from the ballot.Copyright 2012 The Associated Press.