Abstract
Recent studies point to dramatic ‘mandate switches’ by elected politicians, while others suggest higher levels of mandate loyalty. Yet, two of the oldest party systems in Latin America, Colombia and Venezuela, have not been extensively examined. Legislative activity across single issue parties is examined to determine whether they are able to stay focused and consistent with the party's policy goals. The analysis identifies the importance of stated policy goals, which are likely to provide long-term electoral benefits, and nomination procedures as important determinants of legislative action among single issue parties. The results shed a new light on parties in Latin America by suggesting that parties are capable of acting in accordance with their stated single-issue platforms.