What caused 3m people to protest in Brazil?

Some 3 million people have taken to the streets of Brazilian cities to demonstrate their disapproval of the country’s president, Dilma Rousseff About 1.4 million people participated in the demonstration in Sao Paulo, and another million in Rio de Janeiro Brasilia, saw some 100,000 demonstrators surround the National Congress building in the biggest protest since last March, when about 1 million people took to the streets. Protesters blame the country’s president for Brazil’s economic downturn over the past few years, as well as alleged corruption. The Brazilian opposition has called for an investigation into some of Rousseff’s dealings, accusing her of tax violations and allegedly misusing state funds to finance her re-election last year, with the ultimate goal of impeaching her. Tensions have also been running high since Sao Paulo state prosecutors asked a judge to order the arrest of Rousseff’s predecessor, Luiz Inacio Lula da Silva, on money-laundering charges a few days ago.