Are your next-door neighbors...

...Democrats or Republicans? Not sure? If they're married and you live in the suburbs, ask yourself this question: Do they have a gun in the house? 

According to Nate Silver (yes, he's still around), writing in the Times today (my emphasis): 

If they identify as Democratic voters, the chances are only about one in four, or 25 percent, that they have a gun in their home. But the chances are more than twice that, almost 60 percent, if they are Republicans. 

Whether someone owns a gun is a more powerful predictor of a person’s political party than her gender, whether she identifies as gay or lesbian, whether she is Hispanic, whether she lives in the South or a number of other demographic characteristics. 

Now ask yourself: Are you surprised?