NEW : Capriles and Maduro hold massive rallies to close their presidential campaigns . Maduro 's campaign theme song features Hugo Chávez 's voice . One opposition website alleges that Maduro has said Chavez 's name Chávez has criticized Maduro for ` ` hiding behind '' Chavez . Shortly before his death , Chavez nominated Maduro to be his successor .
NEW : Capriles and Maduro hold massive rallies to close their presidential campaigns . Maduro 's campaign theme song features Hugo Chávez 's voice . Chávez has criticized Maduro for ` ` hiding behind '' Chavez . Shortly before his death , Chavez nominated Maduro to be his successor .