Congressman Dan Rostenkowski came out fighting today, saying he will not plead guilty to any of the 17 charges federal prosecutors have brought against him. The Illinois Representative was forced to give up a key House leadership role because of the indictment, but he proclaimed forcefully that "I will prevail" in the ongoing case. The prosecution claims Rostenkowski may have gained as much as $650,000 in a series of misuses of office over the past two decades. "Some ask, 'How could you have done these things?' " Rosty told a pack of reporters outside the court. "The answer is simple: I didn't do them."