Costa Rica’s recent referendum was supposed to decide once and for all whether that country should enter into the Central American Free Trade Agreement (CAFTA). Instead, the Oct. 7 vote polarized and politicized this small country of four and a half million people more than anything since neighboring Nicaragua’s war between the Sandinistas and the Contras two decades ago. And even though supporters of the treaty prevailed by a slim margin, CAFTA opponents still have a few cards to play and may yet block its implementation.