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Sen. David Vitter, R-La., takes part in a hearing on Capitol Hill in Washington, in this July 17, 2007 file photo. Vitter will not have to testify about his ties to an upscale Washington escort service, a defense attorney said Monday, April 14, 2008, sparing the Louisiana Republican an embarrassing trip to the witness stand. (AP Photo/J. Scott Applewhite, File)
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