The problem is, the viewers of those other shows believe what they are "fed," fallacious or not.
In this segment from his Sept. 5th show, Jon Stewart covers the many flip-flops of John McCain, showing us an amazing and undeniable video account of saying anything to get elected.
Everyone assumed this son and grandson of admirals would be a star at the Naval Academy. He showed 'em (pan to McCain's 894th ranking at the Naval Academy).More available on flip-flopping McCain:
Part 2: Abandoning Everything He Always Stood For
2000: If we repealed Roe v. Wade tomorrow, thousands of young American women would be performing illegal and dangerous procedures.
2006: I do not support Roe v. Wade; it should be overturned.
(BTW, what people don't realize is that even if Roe v. Wade were overturned, abortion would not be illegal. Instead states would be able to define their own sets of rules.
2004: I would clearly support not extending those tax cuts.
2008: I'll make the Bush tax cuts permanent (otherwise known as tax cuts for the rich).
2002: I am very certain that this military engagement will not be very difficult.
2006: Many of us fully understood from the beginning (it) would be a very, very difficult undertaking.