What’s the connection between grocery stores and politics?

If a county has a Whole Foods, there’s an 89% chance it voted for Obama.

Via The Righteous Mind: Why Good People Are Divided by Politics and Religion:

If you find yourself in a Whole Foods store, thereâs an 89 percent chance that the county surrounding you voted for Barack Obama. If you want to find Republicans, go to a county that contains a Cracker Barrel restaurant (62 percent of these counties went for McCain).