CARACAS, Venezuela - Opponents of Venezuelan President Hugo Chavez are demanding further investigation of what they call gross irregularities in the voter registry, pointing to a western state where 1,921 people by the name of Gonzalez are listed with an identical birthday. The electoral council, which is independent but faces accusations that it is pro-government, insists the lists are sound, and plans to release an external audit Tuesday as it prepares for December presidential elections. The case of the many Gonzalezes in Zulia state was reported by Roberto Ansuini, an opposition-aligned researcher and former member of the National Electoral Council...