Arkansas voters approved a constitutional ban on gay marriage today, a church-backed initiative in a Bible belt state that was expected to pass easily. They also rejected an amendment that would have extended term limits for state senators and representatives. Organizers behind the amendment said having office holders with longer tenure would help the state strike deals to bring in new big employers. A third proposed constitutional amendment that lets the state legislature issue bonds for economic development projects was handily approved as well. Arkansans also voted down a fourth issue on the ballot, which would have raised minimum property tax rates to benefit public schools. The marriage amendment defined marriage as a union of one man and one woman. Supporters pushed for the amendment even though gay marriage is already banned in state law.