It's about pragmatism.
I worked for GHWBush in '92. I think he was the last really good president for ordinary working Americans. He had a very pragmatic approach to the problems of us ordinary folks. He raised taxes because we desperately needed to pay our debts. He didn't say that we all should "go consume more" as a solution to our economic problems. Nor did he say let's just prop up the poor people. He took a common sense approach to the problem, considered ideas from all sides, and put together practical solutions. He knew that invading Iraq would cost us billions and we need that money here at home, so he didn't do it. IN short, he had good judgment that carried through in all areas. Most non-partisan accounts say he's the best foreign policy president we've had in generations.
Obama has that same pragmatism. He might have different solutions in some cases, but overall, he has the same honest, direct approach to problem solving, free of the constraints of rabid idealsim. He has the same common sense approach to foreign policy that Bush Sr. had. Foreign policy is no place for rabid idealism of any kind.