I hope Bush can sometime articulate that having lots of terrorists try to attack us in Iraq presents challenges, but also opportunities; it is certainly better than having them attack us here.
Maybe there are some security reasons why Bush is not articulating some of this, hard to tell. Or maybe there are some surprises to come and he doesn't want to show his hand. But, personally, I think he's been weak in explaining his case. There is a lot of ammunition he could use.