HINT. HINT.
If Hillary wants to spearhead opposition to this she WILL carry the Southwest in 2008.
Sadly, what you say is true, and even worse, the GOP has asked for it with their complete and utter disregard for public opinion on the matter in a misguided attempt to out-pander the Dems for the support of latinos.
Of course it should be said, that Hillary would not actually do anything about it either. I mean, why would she want to stop the supply of future Dem voters once another amnesty goes through? But its a sad commentary on the inaction of the GOP that simply talking about it is enough to differentiate herself from the ruling party which has been an abyssmal failure on this matter.
And Hillary knows full well that the radical ethnic interest groups will not attempt to tar and feather her as they would a real conservative because they know she isn't being serious. But even if they did, it wouldn't matter as Hillary's media allies would shield her from such attacks by not giving credence to them as they would against a Republican. In fact they'd probably praise her for having the courage to address the issue that sends so many politicians running for cover.
In short, it is a perfect issue for Hillary to latch onto and make her own. And if the Federal Courts do her a favor and refrain from imposing gay marriage/civil unions until after 08 then she'll also be shielded from that since by then even more states will have "settled" the issue for themselves.
I fear the GOP will reap what they have sown.