They’ve painted themselves into a corner now, would imagine their biggest donors are the slavemasters who hire the illegals. If they try to please the multitude of smaller donors and do something about the illegals they’ll lose their big donors.
That is true, but the big money donors only have a few votes. All the money in the world won't help the RNC if even 5% of the base decides to stop supporting them. The illegals who find a way to vote and the pro-amnesty crowd won't help as they will vote for the Dems.
For example, my two Georgia senators (both republicans) are backing this bill hardcore and insulting those who dare to question it. One is up for re-election in 2008 and I've already decided that I'm voting 3rd party for his slot. He can get all the donation money he wants, but he is toast.