I'm not sure what we are arguing. If you took my posts to mean that I thought the recession was a result of W's deficits, either I was unclear or you misread. I do think the credit bubble was a direct result of Greenspan not regulating lenders and keeping rates low, while W increased govt spending by about 1.2 trillion. The chinese demand for debt was not satisfied by TBills, and that led, indirectly, to demand for US real estate debt obligations.
While I'm not a fan of Obama, it is true that he increased spending "only" by around 700 billion, despite the recession.
The debt increase is, as I think you say, the result of funding that 1.2 trillion when "the bottom fell out" of revenues. However, I would disagree if you contend any real econ gain was made during the W years.
Regardless, my original pt was intended to argue that, with 17 trillion in debt and a ration of around 75% (or 100%) debt gnp, there's no good arugment for another budget stimulus.