Graças Foster as the Transportadora Brasileira do Gasoduto Bolivia-Brasil. In 1998, Foster was working for a Petrobras unit that was involved importing natural gas from Bolivia. During this time, she met Dilma Rousseff, who in October 2010, would be elected to serve as the first female President of Brazil. In 1998, Rousseff was a relatively unknown energy official, serving in Rio Grande do Sul in southern Brazil. Foster and Rousseff developed a lifelong professional relationship, based in their mutual support of the leftist Workers Party, which rose to power in 2002, resulting in the election of Luiz Inácio Lula da Silva as
Impeachment of Dilma Rousseff Brazilian national petroleum company, Petrobras, on account of allegations uncovered by the Operation Car Wash investigation, and for failing to distance herself from the suspects in that investigation. Rousseff was president of the Petrobras board of directors during the period covered by the investigation, and approved Petrobras' controversial acquisition of the Pasadena Refining System. However, the Petrobras charges were not included in the impeachment because Prosecutor-General Rodrigo Janot successfully argued that a sitting president could not be investigated while in office for crimes committed prior to election. Rousseff was formally impeached on 17 April 2016. On 12 May, the Senate