There’s a great new infographic by Resurgent Republic, a right-leaning, not-for-profit organization modeled on Democracy Corps, about Hispanics voters. Along with a ton of interesting factoids, it allows for a quick-and-dirty simulation of the effects of the Hispanic vote on the 2012 campaign.
Here are the three factors you can determine: The percentage of the electorate that’s Hispanic, the percentage of the Hispanic vote that goes to the GOP, and the GOP’s percentage of the non-Hispanic vote.
Scenario 1: 2008 Repeat
In 2008, Hispanics comprised 9% of the electorate and voted 31% Republican, according to New York Times exit polls. According to my calculations, the GOP’s percentage of the non-Hispanic vote in 2008 was about 48% (rounding to the nearest whole number). Here’s how 2012 would look if those numbers were repeated:

Not so good for the GOP: They get walloped by a 7-point spread nationally. Then again, that shouldn’t come as a surprise since we’re basically assuming that everything stays the same from 2008. Obviously, that’s unlikely to happen. But what if the GOP were to somehow repeat its best performance ever amongst Hispanic voters, while maintaining the same share of the non-Hispanic vote as 2008?
Scenario 2: Hispanics break to the GOP
In 2004, George W. Bush captured 43% of the Hispanic vote, the best share of any GOP presidential candidate ever. Here’s what would happen if the GOP captured that percentage again, all others things being equal to 2008:

Still not so good for the GOP. They gain a full percentage point in the national two-party vote, but still lose by a nearly 5-point spread. It’s clear, therefore, that Republicans can’t rely on an increased performance amongst Hispanic voters to overcome their 2008 deficit among non-Hispanics.
Scenario 3: 2008 demographics, 2010 levels of support
Here’s what happens if we plug in the GOP’s share of the non-Hispanic vote from the 2010 congressional elections, which I calculated to be about 53% (using CNN’s exit poll numbers), while maintaining Republicans’ dismal 31% of the Hispanic vote.

Better news for Republicans as they take a 2-point lead in the national vote. The GOP’s increase in non-Hispanic votes comes largely from its having captured 60% of whites in 2010, something they look set to repeat in November. Still, it’s a relatively narrow margin of victory.
Scenario 4: Hispanic turnout rises
You’ll notice that for the first 3 scenarios I kept the percentage of voters that are Hispanic at 9, the same as it was in 2008. But many people are predicting that this percentage will increase, given that Hispanics now account for about 16 percent of the overall population. Here’s what would happen if they voted in that same proportion, while the GOP kept its 2010 share of the non-Hispanic vote:

Once again, the GOP loses. But this is an unrealistic scenario because Hispanics, even more than most minority groups, tend to under-represent themselves in the political process. According to one study, non-Hispanic white males participate in politics at a rate 2.6 times that of Latina females. Likewise, on a list of seven unconventional political acts (beyond simply voting), 67% of whites reported having performed at least one whereas only 34% of Mexican Americans (the largest Hispanic subgroup) had.
Bottom line: The Hispanic vote is important. But maybe not as important as conventional wisdom suggests. Even if Hispanics surged to 16% of the electorate, and the GOP failed to make any inroads at all with them, the Dems still only win the national two-party vote by a 1-point spread. And because of Hispanics’ lack of political participation, it’s pretty much inconceivable that such a surge would occur.
I find it much more likely that we will see something similar to scenario 3 in November. Hispanics may increase their share of the total electorate somewhat, but at most by one or two percentage points. The energy of Obamamania has faded from its 2008 glory, and typical patterns of non-participation among Hispanics are likely to reassert themselves. If the GOP can hold on to its share of the non-Hispanic vote (i.e. if it can keep winning whites by 60%), it can afford to do as poorly as it did in 2008 among Hispanics and still win. And if it can somehow increase its level of support among this voting bloc (as it was able to do in 2000, 2002, and 2004) it’ll be able to lose some of that white support and still carry the day.