Guests: Former Senator Russ Feingold (D-WI), former Vice Chairman of General Motors Bob Lutz, Democratic strategist James Carville, astrophysicist Neil deGrasse Tyson, journalist John Heilemann. Topics: Rush Limbaugh's 'slut' comments, campaign fi... (more)nance and Super PACs, Rick Santorum self destructing, 'Blunt' healthcare amendment, the highjacking of the Republican establishment, the auto bailout, climate change, the space program, the importance of scientific advancement, the liberal bubble and the 'joke candidate'.