Maduro was certified the winner of a disputed presidential election Monday amid questions about his ability to lead after he squandered a double-digit lead in the race despite an outpouring of sympathy following Chavez's death.

NPR: Chavez Heir Begins 6-Year Term With Weak Mandate

Democrats were in charge and a disputed election in Florida had raised new questions about electronic voting.

NPR: Local Election Officials Oppose Paper Ballots