Hundreds of thousands (millions) of Brazilians flooded the streets on Sunday in the biggest ever protests calling for President Dilma Rousseff's removal, reflecting rising popular anger that could encourage Congress to impeach the leftist leader. The demonstrations were the latest in a wave of anti-government rallies that lost momentum late last year but have regained strength as a sweeping corruption investigation nears Rousseff's inner circle. Poor Brazilians, who form the base of the ruling Workers' Party support, have not turned out in great numbers in recent protests. But their support for Rousseff has faded as unemployment rises and inflation climbs.