SÃO PAULO—As former President Luiz Inácio Lula da Silva ends his first week jailed for corruption, scores of other senior Brazilian politicians who are suspects in the same sweeping graft investigation, including the current leader Michel Temer, are still free and ruling the country.
That disparity has sparked allegations of a political witch hunt against Mr. da Silva—a working-class icon and would-be presidential candidate—and growing calls to try the accused.
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