Analysis: Former president appeal ruling casts uncertainty over Brazil election

Brazil's former president Luiz Inacio Lula da Silva gestures to his supporters in Porto Alegre, Brazil, on Jan. 23, 2018. Luiz Inacio Lula da Silva is awaiting the outcome of his appeal against a corruption conviction, a ruling that will determine whether he will be able to compete in October presidential elections. (Xinhua/Li Ming)