Jim Gimpel finds a map:

The geographic concentration of the uninsured seems a bit ironic, given that the South and Southwest are not known for being Democratic strongholds agitating for a universal-coverage-single-payer system. But most of the uninsured fall heavily among the ranks of non-voters. The Republican congressional delegations from these states have little political incentive to work on this issue with President Obama. But the President doesn’t look like he needs them, either.