They're appointed by the National Assembly. Mexico is currently trying to replace their system with one where each judge is democratically elected. Critics are

They're appointed by the National Assembly. Mexico is currently trying to replace their system with one where each judge is democratically elected. Critics are calling this a "power grab" by AMLO though since the judiciary has often been the opposition's main way to check him and his party's ambitions. Almost every federal judge in Mexico is on strike because of this