US Democratic presidential hopeful New York Senator Hillary Clinton speaks with a young boy who ran up towards the front at the Sunday service at Monumental Baptist Church in Memphis, Tennessee, 27 January 2008. After black voters in South Carolina deserted her for Barack Obama, Clinton invoked icons Nelson Mandela and Martin Luther King while preaching racial unity. African-Americans, a key Democratic constituency, went overwhelmingly for the Illinois senator in the previous day's primary vote -- in a stunning rebuff for Clinton, and her husband, ex-president Bill Clinton.            AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)