WASHINGTON - Republican Mitt Romney is winning the votes of white male and female voters in his quest to unseat US President Barack Obama, but among all other ethnic groups, Romney is trailing by large margins, according to a Reuters/Ipsos exit poll on Tuesday.

White male voters are choosing Romney by about a 20-point margin, while white female voters are favoring the former Massachusetts governor by more than a 10-point margin, according to the poll.

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