Sunday Talking Heads Preview

This Week with George Stephanopoulos
--Former President Jimmy Carter
--National Security Advisor Stephen Hadley, Bush Administration

Fox News Sunday with Chris Wallace
--Senate Majority Leader Tom Daschle, D-S.D., Obama Backer
--Mayor Michael Nutter, D-Philadelphia, Clinton Backer

Face the Nation with Bob Schieffer
--Secretary of Defense Robert Gates
--Speaker of the House Nancy Pelosi, D-Calif.

Meet The Press with Tim Russert
--Democratic Strategist James Carville, Clinton Backer