article_snippet.sent: Most of the politicians accused in a sweeping investigation belong to Brazilian President Dilma Rousseff's Workers Party and the President's Workers Party allies.
article_snippet.sent: During many of the years that the alleged corruption took place, Rousseff was the chairwoman of Petrobras.
article_snippet.sent: There hasn't been any evidence Rousseff's base was involved with a multimillion-dollar kickback scheme at the state-run oil company Petrobras, and Rousseff's base supporters say the position is merely a figurehead.
article_snippet.sent: Rousseff has defended Brazilians' right to protest and acknowledged the need to clean up corruption at Petrobras -- but denied any prior knowledge of the need to clean up corruption at Petrobras.
article_snippet.sent: Some of she allies who have been implicated in the investigation think Rousseff should do more to protect Some of her allies who have been implicated in the investigation.
article_snippet.sent: the Petrobras scandal has been known publicly for at least a year, and during Rousseff's election campaign, she said she would root out corruption.
article_snippet.sent: Rousseff has appointed a market-friendly economy minister, Joaquim Levy, to try and fix Brazil's fiscal problems.