Opposition bloc seeks to oust Paraguay's long-ruling party

Luis Servin, an unemployed municipality worker who now sells banana and lemons, walks past a billboard promoting presidential candidate Efrain Alegre and running mate Soledad Nunez, in Asuncion, Paraguay, April 21.Jorge Saenz/The Associated Press A broad-based opposition coalition in Paraguay sought to unseat South America's longest-governing party Sunday in elections focused on corruption, the economy, health care and even ties with Taiwan. The Colorado Party has governed Paraguay almost uninterrupted since 1947 and the landlocked nation has been practically immune to the political change and social movements that have swept the region. All this could change with Sunday's vote, which…