...Reflecting that key difference between "Likely" and "Registered" voters.
Normally I would have to say that good or bad, it's just an unjust political fact of life that the President gets the blame or the credit for economic movement, since that is all really in the hands of the amorphous mass of the Congress, with the President only having the power to ask them to implement policy at the start and give it an up-or-down at the end of the process.
However, in Obama's case, he uniquely and richly deserves every ounce of blame, since he made a conscious decision to collude with Reid to stall Congressional action so he could run on a 'Do-nothing Congress' in order to have a foil and to try and reverse the losses of 2010. His runaway regulatory program has only exacerbated the disaster he is intentionally causing for selfish short-term political ends.