Brazil's President Luiz Inácio Lula da Silva was reelected Sunday with 51.8% of the vote. 

Lula's challenger, conservative Flávio Bolsonaro, refused to concede and asked for the results to be annulled. Polling locations were chaotic after a last-minute decision by a Supreme Court justice to extend voting by two hours, CBS News reported. 

The decision may trigger legal action from Bolsonaro. 

Lula's success in the election bucks a trend toward right-of-center candidates aligned with President Donald Trump have seen increasing success.