What states support protectionism?

[Obama-Biden Democrat]

I'd imagine that support for protectionism would be higher in the Midwest and in the South while opposition to it would be higher in the Northeast and in the West

Are you sure about the South being more protectionist? The South has always been very hostile to trade unionism, so I don't know if the South would be very supportive of protectionism. The Jacksonian Upper South/Appalachian regions sure, but the core such as  AR, TX,LA,FL, MS, GA,AL,SC,NC/VA,TN, would be free trade supporters.

[Obama-Biden Democrat]

I'd imagine that support for protectionism would be higher in the Midwest and in the South while opposition to it would be higher in the Northeast and in the West

Are you sure about the South being more protectionist? The South has always been very hostile to trade unionism, so I don't know if the South would be very supportive of protectionism. The Jacksonian Upper South/Appalachian regions sure, but the core such as  AR, TX,LA,FL, MS, GA,AL,SC,NC/VA,TN, would be free trade supporters.

Though perhaps an exception, I believe both of Alabama's Senators at the time may have voted against NAFTA; even one would have been a bit of an outlier in the South. I believe as well that among Reagan's few decisions to increase tariff protections were multiple cases in which tariffs were increased on textiles which are big in, among other states, Strom Thurmond's South Carolina.

Good point. JFK used to rail against textile jobs fleeing MA to the Carolinas and other parts of the South in search of cheaper labor and less regulations.