On 16 March 2016, Rousseff appointed Lula as her chief of staff, a position comparable to that of prime minister. This would have shielded him from arrest due to the immunity that went with the position. Cabinet ministers in Brazil are among close to seven hundred senior government officials enjoying special judicial standing, which means they can only be tried by Brazil's Supreme Federal Court. Supreme Court Judge Gilmar Mendes suspended Lula da Silva's appointment on the grounds that Rousseff was trying to help Lula circumvent prosecution.