I think Mr. Bush faces a singular problem best defined, I think, as the absence of effective conservative ideology - with the result that he ended up being very extravagant in domestic spending, extremely tolerant of excesses by Congress, and in respect of foreign policy, incapable of bringing together such forces as apparently were necessary to conclude the Iraq challenge.
There will be no legacy for Mr. Bush. I don't believe his successor would re-enunciate the words he used in his second inaugural address because they were too ambitious. So therefore I think his legacy is indecipherable.