Bush & Blair are hated by terrorists due to their invasion of Iraq and related imperialistic tendencies
therefore Bush & Blair increase the desire for terrorists to strike
if a U.S. President were seen as willing to negotiate from strength, and less interested in meddling in the Middle East in general, would this reduce terrorist threats in the West?
if a U.S. President, like Clinton or Carter, were seen as actively attempting to resolve Israel/Palestine - unlike Bush, who is clearly a puppet, and therefore useless to the process, would it help matters? Yes
a Democrat must be elected in 2008 - help reduce terrorist threats - vote Democratic!
I think a campaign theme like this might resonate with the voting public in the US & UK - including those with military families - do they really want instigating leaders?