Fernando Haddad (L in center), ex-mayor of Sao Paulo and former minister of education, delivers a speech during a ceremony to unveil his candidacy to Brazil's Presidency in Curitiba, Brazil, on Sept. 11, 2018. Brazil's left-leaning Workers' Party (PT) on Tuesday officially substituted its initial presidential candidate, ex-president Luiz Inacio Lula da Silva, with a more viable alternative. Lula's running mate, Fernando Haddad, was unanimously elected to replace him, the PT's leader in the Chamber of Deputies, Jose Guimaraes, confirmed. (Xinhua/Giuliano Gomes/PR PRESS/AGENCIA ESTADO)