I believe both will be a big change from Bush.

Obama seems to me to be similar to Bush 41 in foreign policy. I think that he has taken the "Powell Doctrine" to heart. He may engage in adventure, but would not be nearly as wasteful with lives and treasure as Bush 43.

I think that McCain will analyze military options much more than Bush did. But I also think that he might take bigger risks for bigger rewards. The desperation of his campaign at this early point indicates that he may not be as prudent as I would like.