Brazilian President Dilma Rousseff and her rival in the Oct. 26 runoff election are facing off Tuesday night in their first debate since the first-round ballot.

Challenger Aecio Neves from the main opposition party is in a dead heat with Rousseff in opinion polls. Neves staged a surprising comeback in the first-round vote earlier this month.

He's expected to hammer Rousseff over accusations of a corruption scheme at state-run oil company Petrobras.

Rousseff is likely to tell those watching the debate that Neves will cut the popular social programs installed during the 12 years that her Workers' Party has been in power.

She's also expected to point to the fact that she beat Neves in the first-round vote in the state where he was a two-term governor.