Brazil's Rousseff says democracy at stake in Senate trial

By Anthony Boadle BRASILIA (Reuters) - A defiant President Dilma Rousseff warned Brazilians on Monday that her conservative opponents were trampling on democracy by using trumped-up charges to oust her and roll back the social advances of the past 13 years. The leftist leader, appearing before the Senate in a trial expected to remove her from office this week, said Brazil's economic elite had sought to destabilize her government since her narrow re-election to a second four-year term in 2014. Ro