article_snippet.sent: One of the biggest: an investigation into a multimillion-dollar kickback scheme at the state-run oil company Petrobras.
article_snippet.sent: Most of the politicians accused in the investigation belong to President Dilma Rousseff's Workers Party and Rousseff's Workers Party allies.
article_snippet.sent: And during many of the years that the alleged corruption took place, President Dilma Rousseff was the chairwoman of Petrobras.
article_snippet.sent: There hasn't been any evidence she was involved with a multimillion-dollar kickback scheme at the state-run oil company Petrobras, and she supporters say the position is merely a figurehead.
highlights_snippet.sent: A corruption scandal has implicated politicians in A corruption scandal party .