WASHINGTON (Reuters) - As polls point to a close presidential election, the country faces the possibility of political chaos - from a repeat of the disputed 2000 election to the remote possibility of a new administration with a president from one party and a vice president from the other. The most likely result on November 6 will be a clear, if close, victory for President Barack Obama and Vice President Joe Biden or Republican Mitt Romney and his running mate, Paul Ryan. ...

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