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ST. PAUL, MN - SEPTEMBER 03: U.S. Mike Pence (R-IN) speaks during a press conference about Republican U.S presidential nominee U.S. Sen. John McCain's (R-AZ) energy policy on day three of the Republican National Convention (RNC) at the Xcel Energy Center on September 3, 2008 in St. Paul, Minnesota. The GOP will nominate U.S. Sen. John McCain (R-AZ) as the Republican choice for U.S. President on the last day of the convention. (Photo by Max Whittaker/Getty Images)

ST. PAUL, MN - SEPTEMBER 03: U.S. Mike Pence (R-IN) speaks during a press conference about Republican U.S presidential nominee U.S. Sen. John McCain's (R-AZ) energy policy on day three of the Republican National Convention (RNC) at the Xcel Energy Center on September 3, 2008 in St. Paul, Minnesota. The GOP will nominate U.S. Sen. John McCain (R-AZ) as the Republican choice for U.S. President on the last day of the convention.  (Photo by Max Whittaker/Getty Images)