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How bad is the situation at Citigroup today? Really, really bad. Citi executives are now frantically lobbying Washington to crack down on short-sellers, something that both Bear Stearns and Lehman Brothers tried to do. (And you know how that turned out.) Meanwhile, Dealbreaker reports that the bank has removed the company's ticker symbol from the screens in the lobby, lest employees start to panic at the sight of Citi shares hovering below $4.