Even if you don’t blame the [debt] crisis on the shrub, at least half the debt is directly attributable to his policy choices. Racking up debt isn’t necessarily a bad thing, and some have even argued that surpluses can be economically dangerous, but for whatever it’s worth, Bush played a big role there. It’s also worth noting that the shrub was increasing the deficit at a time when the economy was expanding — which is exactly the opposite of what Keynesians believe makes sense, and which also made it more difficult for the country to respond to the recession.