Because of Iraq
The Mid-term elections are tomorrow (Nov 7th) and this ad is one last push towards a win for the canidates opposing the war in Iraq (namely democrats & those endorsed by Wesley Clark). While I think its an excellent and truthful ad, I think it would have been better served if they included a few sentences about why the war has caused America to be less secure.
To many the reason is obvious, our presence in Iraq and specifically our lack of proper reconstruction plans for the country has fueled more anti-america hatred. Are some Iraq citizens happy we are there? Probably, but the truth is that the good will we have imposed there slumbers in the shadow of the ill-will we have breed. That ill-will and hatred runs far deeper and is more of a threat than the goodwill that does exist can counter.
Lets get our boys and girls home and soon.

Each place has its own advantages - heaven for the climate, and hell for the society.