Mitt Romney, left, last week at the NAACP convention in New Orleans. President Obama, right, at a campaign event Saturday in Glen Allen, Va. Eric Kayne / Mandel Ngan/AFP/Getty Images hide caption

itoggle caption Eric Kayne / Mandel Ngan/AFP/Getty Images

Republican presidential candidate Mitt Romney participates during the Wolfeboro, N.H., Independence Day parade on Wednesday. Kayana Szymczak/Getty Images hide caption

itoggle caption Kayana Szymczak/Getty Images