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Up next, chris christie tests the comeback trail in iowa and we map out the political divide by the border cries. hillary clinton tests john stewarts patience with a hard choice. >> there are extremists on all sides and people with guns on all sides. leadership has to be tough-minded and very strong, but they have to have enough support to make the hard choices. >> what? you did not do that. what? wow. honestly. that may be, let me go to the junlz on that. that may be the greatest segue in the h...