Lula unifies Brazil's left, but questions remain about its future without him

Brazilian President Luiz Inacio Lula da Silva is set to accept his seventh, likely final, presidential nomination at the Workers Party convention on Sunday.

At age 80, Lula has unified Brazil's left more than at any point in his long political career.

Questions remain about the future of Brazil's left without Lula.

The nomination reflects Lula's continued dominance in Brazilian left-wing politics.