AP Explains: Why Brazilian president faces impeachment

Brazilian President Dilma Rousseff is facing possible impeachment by Congress, with the Senate expected to vote Wednesday on a measure to suspend her. The effort comes amid an angry public mood over the South American nation's worst recession in decades and a big bribery scandal at the state oil company Petrobras. Yet, it is not tied to either of those. The Associated Press explains what's behind the movement to oust her, and how it could play out: …