History will be the judge of President Bush, not current events. Truman, for instance, has only been appreciated after he left office. He was quite unpopular while in office.
As far as the economy is concerned, we are in a cyclical downturn. We have had them before and we will again. The price of energy is due to 30+ years of failed energy policy, both Dems and GOP. In a historic sense, inflation is low as is unemployment. Lord knows where the eocnomy would be without the Bush tax cuts, especially on capital gains.
So, I think given the cards he has been delt, President Bush is doing a pretty good job.