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attempt, congresswoman gabrielle giffords im wolf blitzer. youre in "the situation room." first, an apparent shake-up in the republican race for the white house after a turbulent week that saw herman cain finding new allegations of sexual harassment and rick perry stumbling sadly in a debate. newt gingrich leaping towards the top of a pack in a stunni stunningcome back. jim acosta is watching the race for us as he always does. where do things stand right now? >> some candidates are ste...