Opening statements are scheduled for Monday in yet another Philadelphia political corruption trial. Call this politics, payoffs and a Porsche and put lame duck Congressman Chaka Fattah Sr. at center stage. Fattah, who was defeated in the Democratic Party primary earlier this month, is in the final year of a congressional career that began in 1995. The trial that opens Monday before U.S. District Court Judge Harvey Bartle 3d will determine whether he begins his retirement wearing a prison jump suit. "I'm not sure how he's going to explain some of this," said a source familiar with the case. "It's going to take some gyrations." The 29-count indictment handed up in July charged Fattah and four co-defendants with conspiracy, bribery and fraud. The government alleges that the congressman played fast and loose with federal grants and other earmarked funds, using them to pay off personal and campaign debts, including $600,000 that was spent on his failed Philadelphia mayoral campaign in 2007. The trial is one of four political corruption cases generating headlines. On Tuesday John H. Estey, one-time aide to Gov. Edward Rendell, pleaded guilty in an illegal campaign funding scheme that was part of an FBI sting targeting Harrisburg legislators. In a separate case, the former mayors of Reading and Allentown have emerged as targets in a federal pay-to-play investigation. And then there is South Philadelphia State Senator Larry Farnese, indicted this week in what authorities allege was a $6,000 bribery scheme to insure his election as a Democratic Party ward leader back in 2011.