The Wisconsin Supreme Court was asked Thursday to decide whether the state's 2006 ban on gay marriage was properly put to voters.

William McConkey, a University of Wisconsin-Oshkosh political science instructor, claims the referendum illegally put two issues to voters at the same time: whether to ban gay marriage and whether to outlaw civil unions. A Dane County judge dismissed the case last year, and the 66-year-old Baileys Harbor man appealed to the District 4 Court of Appeals.