How come when Bush's poll numbers were low the libs all screamed about it. But now that Obama's are this low, unprecedented for a president at this point in office, they don't mean a thing?
This is a logical fallacy. I've never had a conversation with you about Bush's approval ratings, and you really have no idea whether or not I've ever "screamed" about his poll numbers. Also, it can be flipped right back at you -
"How come when Bush's poll numbers were low the cons said polls don't mean anything, and now that Obama's are low, cons can't stop screaming about it?"
Polls don't mean a thing, and they never have. But you're wrong as well - it's not "unprecedented". It's happened many times before - In their first year in office, Ford, Carter, Reagan, and Clinton all had lower numbers than Obama has ever had.
And the "index" is a very good measure. The people who most pay attention are the ones who will form the strongest opinion. And those people don't like the guy. More to the point is the trend which has been going negative from day one.
I disagree with that, I think the people who are most likely to form "strong" opinions are the ones who don't really pay attention - the ones who get their politics in 30 second sound bites. Anyone who actually knows that they're talking about usually understands that the truth is almost always somewhere in the middle - not on the far-out part of either side.