As prices continue to rise, some states will have a harder time adjusting than others.
The Natural Resources Defense Council just released its annual "Fighting Oil Addiction" report (PDF), which evaluates all 50 states with regard to their vulnerability to changes in gas prices and the solutions they've proposed.
The vulnerability is determined by what percent of an average resident's income is spent on gasoline. As you can see in the map below, the states most vulnerable are those that have relatively low incomes and less dense populations. Mississippi, South Carolina, and Kentucky have the sorry distinction of being the most vulnerable.