Guests: Entrepreneur Mark Cuban, former TV anchor Catherine Crier, former press secretary Tony Snow, Rolling Stone writer Matt Taibbi (election correspondent), humorist P.J. O'Rourke

Topics: New Hampshire primary, electronic voting machines, Iraq troop surge, subprime lending and prospects for economic recession. Maher refrained from a large-scale discussion of the ongoing writers' strike, offering only a brief opinion in the closing moments of the show.

Guests: Sex columnist Dan Savage, Global Editor-at-Large of Reuters Chrystia Freeland, Dallas Mavericks owner and entrepreneur Mark Cuban, comedian Marc Maron

Topics: American greed, the economy, the environment, Marcus Bachmann's gay therapy, marriage vow pledge, tax pledge, Rupert Murdoch's media empire, Carmageddon on Interstate 405, liberal vs. Christian sexism

Documentary film maker Peter Byck, talk show host Chelsea Handler, owner of the NBA's Dallas Mavericks' Mark Cuban, columnist Reihan Salam, journalist Alex Wagner

Chris Matthews, Governor George Pataki, Mark Cuban and Jorge Ramos.

Senator Al Franken sits down with Bill for the first interview. This week's panel is British journalist Johann Hari, entrepreneur Mark Cuban, and democratic strategist James Carville. Special guest Pitbull joins the panel later in the show.

Guests: An interview with David Hogg, co-founder and board member of the student-led organization March for Our Lives and co-founder of Leaders We Deserve. This week's panel discussion includes Joe Scarborough, political commentator, former Florida Congressman, and co-host of "Morning Joe" on MSNBC; and Mark Cuban, co-founder of Cost-Plus Drugs, founder of the Mark Cuban Foundation, and "shark/investor" on the ABC reality series "Shark Tank."