Guest lineup for the Sunday TV news shows:
ABC's "This Week": Sen. Joseph Biden, D-Del.; Sen. Lincoln Chafee, R-R.I., and his primary challenger, Cranston Mayor Stephen Laffey; actress and animal rights activist Bo Derek.
CBS' "Face the Nation": Democratic National Committee Chairman Howard Dean; Sen. Mitch McConnell, R-Ky.
NBC's "Meet the Press": Sen. Rick Santorum, R-Pa., and his Democratic challenger, state treasurer Robert Casey.
CNN's "Late Edition": Rep. Christopher Shays, R-Conn.; Iraqi deputy prime minister Barham Salih; Ali Asghar Soltanieh, Iranian representative to the International Atomic Energy Agency; Teamsters president James Hoffa and Labor Secretary Elaine Chao; former Clinton adviser Lanny Davis and former Bush campaign strategist Matthew Dowd.
"Fox News Sunday": Sens. Chuck Schumer, D-N.Y., Elizabeth Dole, R-N.C., and Arlen Specter, R-Pa.; Washington Redskins coach Joe Gibbs.
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