After a long string of court victories, the American campaign to redefine marriage has lost a major case in the powerful U.S. Court of Appeals for the 6th Circuit. The decision will have far-reaching consequences. Judge Jeffrey Sutton At recent referenda in the states of Michigan, Ohio, Kentucky and Tennessee, clear majorities of voters supported natural marriage. However, activist judges in lower courts subsequently ruled that these referenda decisions were unconstitutional, effec…