There's obviously a lot more to immigration policy than the issue that Romney and Gingrich battled over, and it's not like Gingrich has the world's greatest position on it. (For example, he opposes a path to citizenship for long-term immigrants who came here illegally.)
But it's important to recognize that even among Republicans, Mitt Romney's decision to side with the neanderthal extreme backfired. As you'll see later today when we release national results on the same question, Republicans across the nation are even more strongly opposed to Romney's stance than they were in Iowa. That's actually good news for America: unlike Mitt Romney, most Republicans think immigrants should be treated like human beings.