I can think of an imbecilic blunder from each of them.
George HW Bush breaking his "No New Taxes!" Pledge.
And George W Bush allowing Bremer to disband the Iraqi Army and throw all the Sunnis out of the Iraqi government.
In both cases I was screaming at my radio regarding how imbecilic such a decisions were, and both of them had EXACTLY the consequences that I thought they would.
Anyone should have been able to see either of those decisions would produce HORRIBLE results, yet Neither one of the Bushes seemed to be able to grasp what would happen.
These complaints about disbanding the Iraqi army are overrated. As Obama is responsible for ISIS even though Bush (43) is blamed for everything.