Rep. David Wu wears a tiger costume in Portland, Ore.
In this Oct. 2, 2010 file photo provided by the Willamette Week newspaper, Rep. David Wu wears a tiger costume in Portland, Ore. Wu is calling a published report about an alleged unwanted sexual encounter with a young woman "very serious" but has not yet said whether the accusation is true. The Oregonian reports that a young woman from California has accused the Democrat of an unwanted sexual encounter in November 2010. The newspaper said the information came from sources who wanted to remain anonymous. (AP Photo/Willamette Week, File)
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