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Sen. Lindsey Graham, R-S.C. Former GOP presidential nominee Mitt Romney will interview former Democratic Vice President Joe Biden during a Friday evening even Rogelio V. Solis | AP file photo - In this Jan. 28, 2015 file photo, former GOP presidential candidate Mitt Romney speaks at Miss Sen. John McCain, R-Ariz., delivers his speech titled "America's Enduring Commitment to Security and Prosperity in Asia"