巴西举行总统选举

Voters in Brazil are heading to the polls to vote in one of the country's most tightly contested presidential elections in decades.

Polls show leftist incumbent President Dilma Rousseff has a slight lead over her opponent, center-right senator Aecio Neves in the runoff election.

Sunday's vote is widely seen as a referendum on the Workers' Party's 12 years in power, which is credited with expanding social welfare programs and lifting millions out of poverty to the middle class.

However, Ms. Rousseff's last four years in office have been marked by poor economic growth and recession. She has also faced massive anti-corruption protests and criticism over spending on the World Cup.

Neves, who has wide support among Brazil's wealthy elite has promised to continue the Worker's Party's social program while reigning in government spending.