Opponents of proposals often come up with creative ways to express their opposition. Case in point: rather than debating on the merits of a proposal to use a sales tax increase to fund road improvements in Missouri, the Missouri Association for Social Welfare is challenging the language of the ballot summary of the proposal. The association filed a lawsuit Monday over the summary that voters would see if supporters gather enough signatures to get the proposed constitutional amendment on the 2014 ballot. Supporters say such a challenge rarely works. Objections include the summary’s description of the tax increase as “1 percent” instead of one percentage point, and a statement that toll roads would be prohibited. Opponents say the initiative requires voter approval to add tolls on roads or bridges that exist before 2014, which could allow tolls on structures that are built later.