It stopped being Bush's economy when Obama authorized the stimulus package to restore the economy and bring unemployment below 8%. Three years later we are still waiting. It became Obamas economy when he ran on cutting the debt in half instead of doubling the debt and borrowing even more money from the bank of China. The very thing he called out Bush on.
Now, I am not a fan of Bush's economic policies but at some point you have to recognize that current policies are not working, take responsibilty, and work to change it. Obama just keeps doubling down, refueses to take responsibility for anything and forging ahead with policies that don't work with the same old tired mantra, its Bush's fault.
Obama is feckless and must go.