To be fair, it seems to me like politicians in general have lower favourables now than historically. But that still doesn't excuse Romney of course.
Naw, it's just Romney.
Has anyone polled Bush lately? I found a CNN poll from September where he was 42-53, which is comparable to Romney's numbers.
Here is how Bush does today:
BTW: George W. Bush has a 45-50 favorable rating these days, according to the poll - among all voters.
It appears Romney is such a weak nominee that the Republicans would be better off with George W. Bush as their candidate.