Antoin "Tony" Rezko leaves federal court in Chicago in this Oct. 19, 2006, file photo. Mr. Rezko spent years pouring thousands of dollars in campaign contributions into Barack Obama's climb from the Illinois legislature to Capitol Hill, and helped him raise tens of thousands more. A former Illinois bank official, now claiming whistleblower status, says bank officials replaced a loan reappraisal that he prepared for a Chicago property that was purchased by the wife of now-convicted felon Tony Rezko, part of which was later sold to next-door neighbor Barack Obama. In a complaint filed Thursday in the Circuit Court of...