VIEWERS' GUIDE: Candidates hone final arguments for Round 3


WASHINGTON - It was barely three weeks ago that Donald Trump opened the first presidential debate by asking, with faux deference, if it was OK to refer to his opponent as "Secretary Clinton."

By Round 2 he was back to calling Hillary Clinton "the devil." Since then, the Republican candidate's scorched-earth campaign tactics have left all sides wondering just how low things will go in the third and final presidential debate, coming up Wednesday night.

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