A Republican Congress would be unlikely to make that mistake again, even if a Republican president wanted to. The big question for 2012 is whether Republicans will win Congress and/or the White House. If Democrats win Congress and the White House in 2012, amnesty is virtually certain, along with other disasters.
The only consideration anti-amnesty voters should have is the removal of Obama from office, and who can beat him. Any of the R field will be light years better on the subject.
Excellent point