A supporter of Republican presidential candidate Mitt Romney holds a vintage campaign poster of Romney's father, George Romney, in Albion, Mich. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Mitt Romney sings the national anthem before speaking at a Tea Party event at the Bakers of Milford Banquet Hall on Thursday in Milford, Mich. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images

Mitt Romney shakes hands with supporters after a town hall meeting at Eagle Manufacturing in Shelby Township, Mich., on Tuesday. Andre J. Jackson/MCT/Landov hide caption

itoggle caption Andre J. Jackson/MCT/Landov