Here's how (link):

If [11 million illegal aliens] had been on the voting rolls in 2012 and voted along the same lines as other Hispanic voters did last fall, President Barack Obama’s relatively narrow victory last fall would have been considerably wider, a POLITICO analysis showed.

Key swing states that Obama fought tooth and nail to win - like Florida, Colorado and Nevada - would have been comfortably in his column. And the president would have come very close to winning Arizona.

Republican Mitt Romney, by contrast, would have lost the national popular vote by 7 percentage points, 53 percent to 46 percent, instead of the 4-point margin he lost by in 2012, and would have struggled even to stay competitive in GOP strongholds like Texas, which he won with 57 percent of the vote.

That's a static analysis, and it would be interesting to know just how much of the "Hispanic vote" the GOP would need to get to stay even or turn things to their advantage. It would also be interesting to find out which universe someone lives in if they think the GOP could gain that share of the "Hispanic vote" any time over the next several decades.

See Hispanic vote for more. Note that the GOP is seeking a solution to their demographic problems by turning to the people who created the problem in the first place. In part due to corruption and in part due to the fact that they just aren't that smart, the amnesty many of their leaders support would make things far worse for them and they can't get behind an alternative to helping the Democratic Party get millions of new voters and a big electoral advantage.