If Bush is still in office the dims will blame him, rightfully, for doing nothing to stop it. If a dim is president then the republicans will blame him, rightfully, for doing nothing to stop it. Regardless, neither side will take any responsiblity for this because securing the almighty hispanic vote is more important.
Of course, most of the terrorists we have apprehended came through the Canadian border (the Y2k plots to blow up the Space Needle,etc). Ain't it time for Minutemen on the Northern border?