Fumo is accused of misusing millions of dollars that belonged to the state, a maritime museum and a nonprofit community group. He was long one of the Legislature's most powerful figures before deciding not to seek re-election last year.
Fumo and Rendell are not considered close political allies. Last year, Rendell endorsed Fumo for another term, despite the indictment. But Fumo decided not to run.
Fumo, a multimillionaire banker and lawyer, has beaten criminal charges twice before.
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