Rousseff chief of staff accuses lower house speaker of blackmail Brazilian president Dilma Rousseff's chief of staff Jaques Wagner accused lower house speaker Eduardo Cunha of using his power to start an impeachment process for blackmail. "One great thing now is that we jumped from behind the scenes to the stage. And that stops any blackmailing," Wagner said Thursday at a press conference in Brasilia, one day after Cunha officially accepted an impeachment petition against Rousseff. IMAGES AND SOUNDBITES//COMPLETES VID827297_EN////ATTENTION: REFILING TO CORRECT LEAD AND HEADLINE//