Brazilian President Michel Temer (C) arrives to the signing ceremony of a decree that fees differential prices for payment in cash and with credit card at the Planalto Palace in Brasilia, on June 26, 2017.  Temer faces his own crisis with the prosecutor general expected to request formal corruption charges against the president Monday or Tuesday. / AFP PHOTO / EVARISTO SA        (Photo credit should read EVARISTO SA/AFP/Getty Images)