He only has 4 years. Once done with Iraq, I doubt we can do anything more but perhaps help Iran undergo regime change, hopefully without invasion (except for some secret military operations).
It isn't like President Bush can change the entire Middle East himself.
Whoever is POTUS after the 2008 election will have to continue the trend. And, I don't know if there is really anybody but Bush with the determination to continue such an extremely interventionist policy full-bore. Even among Republicans, that person would be hard to find.
So, while I am hopeful we will see significant change in the next four years, I am also a realist. I think that in order to accomplish the goals we need to accomplish on the domestic front....tax reform, social security reform, and if we can somehow also manage it, tort reform, we can not expect the entire ME to be transformed by President Bush. Iraq will be, and hopefully that will lead to other countries, but he can't do it all. At most, we may also be able to change Iran before 2008, and that is not even a sure thing.
Unless of course he starts a draft and massive military build-up, but I would not support that, so definitely the general public would not either.
Somebody will need to take up the torch after 2008 to continue the progress.
Think of Ron Reagan and the Berlin Wall....raise your vision, I would not bet against GWB....the man is hitting his stride!