Most aldermen, most politicians are hos," corrupt Chicago Ald. Arenda Troutman said, rather famously, on federal tape. She wasn't speaking about gardening tools, was she? Troutman was talking about the politics of Chicago, which is, if you've forgotten, the political corruption capital of the United States. Troutman represented the South Side's 20th Ward. At her 2009 sentencing, she squirted a few tears, sobbed, prayed, begged and then got four years in federal prison anyway. And on Wednesday her replacement, Ald. Willie Cochran, a former Chicago police officer who campaigned as something of a corruption buster, was himself indicted on federal...