It's all Bush's fault.

This might be a newsflash for some, but the crisis of '08-09 was not solely the fault of the Bush admin by any stretch of the imagination. It was sparked by the housing bubble / credit crisis, and of course it spread.
The housing bubble began in '97, and was a result of legislation going back many years that led to bad loans being written because of the idea some politicians had that everyone should have a "right" to be a homeowner. Not everyone is cut out for the responsibilities of home ownership, believe it or not.
Of course some took this idea and ran with it, and many, many bad loans were funded - many of which were sold by the lender who originated them to other institutions or investors right after they funded them.
I was a mortgage broker for several years many years ago.
And when institutions are borrowing 10, 20, 30 bucks for every one buck they have in equity to buy bad loans and other risky investments, it's not gonna be a gravy train forever. And when it goes bad, we now all know what happens.