CARACAS, Venezuela (Reuters) - Supporters and opponents of Venezuelan President Hugo Chavez clashed on Wednesday, fighting running street battles in a western city and skirmishing with fists, sticks and stones outside the presidential palace in Caracas. Several people were hurt in the disturbances, which reflect growing political tensions in the world's fourth largest oil exporter, where left-wing populist Chavez is facing growing opposition to his three-year-old rule. Fierce fighting broke out in Barquisimeto, 218 miles (351 km) west of Caracas, when followers of the outspoken president confronted members of Venezuela's Workers Confederation, or CTV, the country's largest trade union, which...