WASHINGTON - US voters say that President Barack Obama performed better than Republican rival Mitt Romney by a substantial margin in their second debate, according to a Reuters/Ipsos poll released on Wednesday.

Forty-eight percent of registered voters gave the victory to Obama, while 33 percent say Romney prevailed in the Tuesday debate, the online poll found.

The poll reflects the broad consensus of debate observers who said Obama's forceful approach gave him the upper hand over Romney, who was widely seen as the victor in their first matchup on October 3.

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