Guests: Comedian George Carlin, correspondent Katty Kay, economist Stephen Moore, The Dixie Chicks, talk show host Tucker Carlson

Topics: Presidential election debates, religion

Guests: Former baseball slugger José Canseco, actor Tim Robbins, Rep. Stephanie Tubbs Jones, talk show host Tucker Carlson, Gov. Mike Huckabee

Topics: On steroids, on Iran and Iraq, on religious belief, Ward Churchill, President Bush, on Covenant Marriage, Million Dollar Baby

Guests: Arianna Huffington, Tucker Carlson, Michel Martin, Spike Lee, Chris Webber

Topics: Valerie Plame, New York Times, health care, NBA dress code, governments response to Katrina, conspiracy in New Orleans

Guests: Columnist Paul Krugman, MSNBC host Tucker Carlson, The View co-host Joy Behar; via satellite, fmr Pres Vicente Fox (Mexico) and author/activist Naomi Klein

Topics: U.S./Mexico relations and immigration, Republican presidential debates, State Children's Health Insurance Program and Bush's veto, Middle East policy, more on Blackwater USA incident

Guests: Actress Kerry Washington, fmr. White House Press Secretary Scott McClellan, fmr. Lt. Gov. Michael Steele, journalist Jeffrey Toobin, and Real Time correspondent Dan Savage

Topics: 2008 Republican National Convention