Meant to post to this earlier today, but if you have not already seen it, read David Brooks' excellent op-ed piece in this morning's NY Times. Brooks makes the case that Republicans are betraying their own principles when they oppose reform.

He also does a good job explaining what many in the GOP fail to get - that even if the House can get to passage of a bill, they've seriously damaged their brand with immigrant communities and they've got years of work ahead of them repairing it:
The final conservative point of opposition is a political one. Republicans should not try to win back lower-middle-class voters with immigration reform; they should do it with a working-class agenda.

This argument would be slightly plausible if Republicans had even a hint of such an agenda, but they don’t. Even then it would fail. Before Asians, Hispanics and all the other groups can be won with economic plans, they need to feel respected and understood by the G.O.P. They need to feel that Republicans respect their ethnic and cultural identity. If Republicans reject immigration reform, that will be a giant sign of disrespect, and nothing else Republicans say will even be heard.

Whether this bill passes or not, this country is heading toward a multiethnic future. Republicans can either shape that future in a conservative direction or, as I’ve tried to argue, they can become the receding roar of a white America that is never coming back.

That’s what’s at stake.