Coming Up on This Week with George Stephanopoulos

— -- In a Sunday exclusive, George talks with Sen. Joe Biden, D-Del., chairman of the Senate Foreign Relations Committee. Following his congressional delegation trip to observe the historic elections in Pakistan, Biden discusses the U.S. and international response to the elections and the state of affairs in the region.

Then, in another exclusive, Senator Kay Bailey Hutchison, R-Tex., joins George to talk about her recent trip to Afghanistan, Pakistan and Iraq. Ahead of the Texas primary, Hutchison also weights in on what it will take to win her home state.

And on our "Roundtable," the Washington Post's E.J. Dionne, Wall Street Journal columnist Peggy Noonan, and ABC's Cokie Roberts and George Will debate the week's politics.