ST. LOUIS - OCTOBER 01:  Washington University student Madeline Thoman (R) rehearses as a stand-in for Republican Vice Presidential candidate Alaska Gov. Sarah Palin at the site of the Vice-Presidential debate which takes place tomorrow evening at Washington University October 1, 2008 in St. Louis, Missouri. Democratic vice-presidential candidate U.S. Sen. Joe Biden (D-DE) will debate Republican vice-presidential candidate Alaska Gov. Sarah Palin in tomorrow's event. Getty Images logo Getty Images 41 months ago

ST. LOUIS - OCTOBER 01: Washington University student Madeline Thoman (R) rehearses as a stand-in for Republican Vice Presidential candidate Alaska Gov. Sarah Palin at the site of the Vice-Presidential debate which takes place tomorrow evening at Washington University October 1, 2008 in St. Louis, Missouri. Democratic vice-presidential candidate U.S. Sen. Joe Biden (D-DE) will debate Republican vice-presidential candidate Alaska Gov. Sarah Palin in tomorrow's event.