If every undocumented immigrant had cast a vote for President Obama in 2012, he would have won Arizona, Georgia, North Carolina and Texas, and he would have beaten Mitt Romney by nearly 11 percentage points nationally, instead of three.
Only citizens can vote, however, and 11.2 million unauthorized residents didn't get the chance.
But with immigration overhaul on the table, legalizing new Democratic voters looms as a threat for conservatives who don't want to hand their political foes a potential windfall of 11.2 million new voters with the creation of a pathway to citizenship -- and to voting rights -- with a comprehensive bill.
"The fear that many people have is that the Democrats aren't interested in border security, that they want this influx," Rush Limbaugh griped during his Tuesday interview with overhaul champion Sen. Marco Rubio of Florida. "For example, if 70 percent of the Hispanic vote went Republican, do you think the Democrats would be for any part of this legislation?"
New immigration policies could mean in influx of new voters, but Republicans needn't worry about it in the short term. See Also: Gang of Eight Accelerates Immigration Reform Pace
"Under almost any scenario, it's pretty far in the distance," Jeff Passell, senior demographer at the Pew Hispanic Center, said of the prospect that unauthorized immigrants' gaining voting rights would pump up numbers significantly enough to meaningfully change the U.S. electorate.
And yet, the "influx" wouldn't be negligible: "Realistically, we're talking about potentially adding probably 5 million potential voters or so in 10 years," he said.
Hispanic voters broke 71 percent for Obama in November, and Republican strategists recognize that the party has failed to court Hispanic voters effectively. But depending on how slowly the citizenship line moves, the Republican Party will have a decade or so to shake its anti-Hispanic stigma.
See also: A Glossary for Immigration Reform
"It's a long time coming. You're talking about 15 to 20 years before we're talking about a whole slew of new voters coming into the electorate," said Jennifer Korn, executive director of the Hispanic Leadership Network, who served as Hispanic outreach director for George W. Bush's presidential campaign.
"If Republicans can map out and change their positions with things that Hispanics do support -- on less government, lower taxes, less regulations on small businesses -- then they can really compete for the Hispanic vote over the next 20, 30 years."
There are 11.2 unauthorized immigrants living in the United States, according to the Pew Hispanic Center's estimate. While most are of voting age (Pew estimates just 1 million younger than 18), the deluge of new Democratic voters might not be as substantial as Limbaugh implied.
In other words, it's not as if Democrats will gain 11.2 million votes in the next few years. Here are some things to keep in mind:
Unknown: House Effect. Presidential politics are easy to figure, but voter trends get more interesting in House races. And not much is known about where, specifically, undocumented immigrants live. The Pew Hispanic Center would only categorize them as largely "metropolitan," meaning the undocumented population is concentrated in cities and suburbs.
But with heavy congressional-district gerrymandering in Southwestern states such as Texas, where Republicans control the state legislature, it's possible newly legal voters will fall in districts that are already heavily Democratic by design, as Republicans have cordoned off the deepest pockets of blue in congressional redistricting.