I have been quite skeptical about the ability of the Republican party to win over Latino voters. As others and I have noted, Latinos don't vote Democratic just because of immigration policy. They vote Democratic because they are more ideologically "in sync" with the Democratic party. That's why I've felt that going along with immigration reform was unlikely to net Republicans many Latino voters.
That said, I can't agree either with the math in a Politico article titled "Immigration reform could be a bonanza for Democrats". The article starts off promisingly enough with the premise that if immigration reform passed and undocumented immigrants became citizens, Latinos would start voting Democratic in even larger numbers. I can go along with this because the main reason anyone votes for or against a political party is for its economic platform, and 81% of first generation Latino immigrants say they want a "bigger government with more services", compared to only 48% of Americans overall.
Politico then uses the commonly quoted figure of 11 million undocumented immigrants and claims that there would, therefore, be "up to" 11 million undocumented immigrants up for grabs if they all became citizens. If these 11 million then voted along the lines of the Latinos who cast a ballot in 2012, Obama would have won the national vote by 7pt instead of 4pt. He could have carried Arizona and even Texas, which were each won comfortably by Republican Mitt Romney.
The problem I have, though, is why would anyone use the 11 million figure for reference.
First off, 1 million undocumented immigrants are under the age of 18. I don't care what your immigration status is, you can't vote in United States presidential elections if you are under the age of 18.
Second, of the 10 million adults, 19% aren't actually Latino; 11% are Asian. Asian voting patterns tend to be less stable than Latinos. In the past election, Asians went for President Obama by about 45pt. Twenty years ago, they went for Republican George HW Bush.
Without more research (and there is surprisingly little of it), it's unclear to know how undocumented Asian voting patterns would change given immigration reform. Also, keep in mind that about 60% of these Asian immigrants are in California and Washington State alone – so they're not exactly going to be a game-changer in the electoral college.
Third, I tend to doubt that all 8 million adult Latino undocumented immigrants would go for citizenship. A Latino Decisions poll says 87% of them would, but I'm skeptical. Only 60% of all legal immigrants actually apply for citizenship. Since the Immigration Reform and Control Act of 1986, only about 40% of the newly eligible immigrants by so-said act became citizens. It would be reasonable to expect a similar percentage this time.
Only 36% of Mexican immigrants who are eligible to become citizens have gone through the process. Mexicans make up 72% of all undocumented Latino immigrants. Six in ten of the other 28% of eligible Latino immigrants have become citizens.
All together, if undocumented Latino immigrants become citizens at the rate that eligible Latino immigrants do, then we're looking at 3.5 million new voting-age citizens. That 3.5 million is a far cry from the 11 million we first talking about.
Finally, just how many of these 3.5 million undocumented Latino immigrants can be expected to vote in the presidential election? Per the standard census Current Population Survey (CPS), only 49.9% of all voting age Latino American citizens cast a ballot in 2008. (Note, there is no report available for 2012 as of this point.) Based on pre-election surveys and work by Michael McDonald, there is reason to believe that percentage may have dropped further in 2012.
All told, it would seem that only about 1.7 million new Latino voters would be added if undocumented immigrants were granted citizenship. Nationally, this would be a net of about 775,000 votes. This would increase Obama's vote margin, but not to 7pt; it would only go up to about 4.4pt – in other words, half a point from where it actually was in November 2012. Even adding in new Asian voters, who vote at a lower rate than even Latinos, and other undocumented immigrants (and controlling for the percentage who apply for citizenship, percentage of citizens who vote, and the percentage who voted for Obama), the margin probably only goes up to, at most, 4.6pt.
The amount this would shift individual states in elections is debatable. Take Nevada, where, at last count, there were 190,000 undocumented immigrants – the highest percentage of any state population. Most of them are Latino. Apply the same math we did above, Obama would have gained about 17,000 votes. It would have increased his state margin of victory by 1.4pt. That's not nothing, but we're talking about the state with the largest percentage undocumented immigrants.
Most states aren't close to Nevada's undocumented immigrant population, while the ones that are simply aren't competitive at the president level: Arizona, California, and New Jersey. No state in 2012 would have had a different outcome if undocumented immigrants were given the right to vote.
The truth of the matter is that passing immigration reform won't be a votes "bonanza" for the Democratic party because of potentially or newly enfranchised undocumented immigrants. That doesn't mean passing immigration reform will help the Republican party among Latinos; the GOP should probably still be worrying about its Latino voter appeal. But it's not facing a landslide from a new citizen electorate.
http://www.guardian.co.uk/commentisfree/2013/apr/23/immigration-reform-latino-voter-bonanza-democrats