Prosecutors on Monday filed new corruption charges arising out of the huge bribery scheme at Petrobras, the national oil company, against the treasurer of the ruling Workers Party — putting additional pressure on President Dilma Rousseff at a time when she is fighting calls for her ouster over the burgeoning scandal.
The charges against the treasurer, João Vaccari, moved the payoff scandal closer to Ms. Rousseff herself. A former executive at Petrobras testified earlier this month that he met with Mr. Vaccari to define how the party should receive bribes from contractors vying for business with the oil giant.
The former Petrobras executive, Pedro Barusco, who was also charged in the scheme on Monday, said that the Workers Party had received as much as $200 million in bribes. Mr. Barusco said that some of those payoffs were channeled to Ms. Rousseff's first presidential campaign, in 2010.