Does this chart say that by the time Obama came into the Presidency, the fall had been going on for 24 months already, and it was -6% (i.e., just about the lowest point on the chart)?
That put most of this on the last 2 years of the Bush administration.
When did the Democrats get control of the House from which all spending originates????
Look back over time. The economy always tanks with a Democrat legislature. To pretend otherwise is either stupid, or evil, or both.