U.S. Rep. Luis Gutierrez made $420,000 on a series of speculative real estate deals, some involving political contributor and Chicago real estate developer Krzysztof Karbowski. And, the FBI is at least looking into some of Gutierrez' past activities: Gutierrez sent a letter to Mayor Richard Daley seeking support for a controversial project built by one of the congressman's political donors who also had lent him money. The newspaper reported that federal authorities investigating zoning matters have shown interest in the Gutierrez letter... The FBI has obtained the letter Gutierrez wrote in...