I think that it is true that terrorism during the time that republicans have been in control, over the past 8 years, have helped to shift focus to doing the obvious (fighting terrorism), rather than focusing on America's many domestic problems. September 11th made Bush and Guiliani look so great, because they reacted in the only way that was appropriate given an attack at that scale on US soil. It has been a while since then, and also the semi-pointless wars that have been fought in Iraq and Afghanistan are no longer just theoretical, making the GOP look good. Simply put, I think that the GOP in theory is able to take a strong stand internationally, but in the end isn't very effective at all. Another attack would put Bush on the defensive again and allow him to do what he does best, talk a bunch of garbage that never really becomes reality.