Coming Up on This Week with George Stephanopoulos

— -- This Sunday, George goes "On the Trail" with former Sen. John Edwards in South Carolina. After a well-received performance in Tuesday's debate, Edwards discusses where things stand with his campaign. Will his sharp critiques of Sen. Hillary Clinton continue? And can Edwards' populist message help him break out of the Democratic field?

Then, on our "Roundtable," E.J. Dionne, Michael Gerson, Ron Brownstein and George Will debate the week's politics

And our "Voice," actress Ashley Judd. Earlier this year, the YouthAIDS Global Ambassador and several Bollywood stars traveled around India to explore why young women are increasingly at risk for HIV infection, and how HIV travels from high risk groups to the general population. Judd's journey was documented in a new National Geographic film, "India's Hidden Plague."