Republican presidential candidate and former Massachusetts Gov. Mitt Romney, right, and Republican vice presidential candidate, Rep. Paul Ryan, a Wisconsin Republican, campaign Friday in Lancaster, Ohio.
Vice President Joe Biden speaks Friday at the University of Wisconsin La Crosse in La Crosse, Wis.
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Broadening his attack on administration foreign policy, Mitt Romney accused Vice President Joe Biden on Friday of “doubling down on denial” in a dispute over security at a diplomatic post in Libya that was overrun by terrorists who killed the U.S. ambassador and three other Americans. “The vice president directly contradicted the sworn testimony of State Department officials,” the Republican presidential candidate said.