PIERRE, South Dakota: Supporters of a proposed medical marijuana measure, also known as Measure 13, are already preparing their campaign efforts for the November election. The official campaign committee in support of the measure is "Yes for Compassion, Yes on 13!" According to the state campaign finance database, an opposition committee has yet to register. The South Dakota Sheriffs' Association said this month that it is expected that law enforcement officials will oppose the measure because it would make enforcement of drug laws difficult. In July 2010, supporters revealed that although they had not yet spent a lot of campaign funds, it could easily "get very expensive." According to reports, supporters plan to hire field workers, recruit volunteers to explain the measure to voters, register voters and advertise on television and radio. According to state campaign finance reports, Yes for Compassion reportedly received $5,046 and spent $1,644. As of June 30, the committee had $3,402 on hand.