The U.S. decision to take Adams seriously also made it harder for him to backtrack from diplomacy.

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He appeared to backtrack from a pledge made a day earlier to bring in outside experts to determine the cause.

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It has a strong, well-paced story that propels it forward, but you can diverge from that path, backtrack, and explore.

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Demands of orthodoxy from the Tea Party base make it very difficult for Republican Presidential candidates to backtrack toward the middle.

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