Democrat's rule?

This WaPo essay predicts a decade-long (and maybe longer) domination by Democrats in both local and national politics. While I don't argue with the numbers that it cites, I'm troubled by its failure to recognize unforeseen contingencies, including, most notably, another terrorist attack between now and the 2008 elections. We've learned already that we're a nation of sheep, and it certainly wouldn't take much to once again shepherd us by fear into another corral. (Excuse the ugly metaphor.)