I've already voted, but I will make a map:
90% Red: The Deep South, pivotal for the South's very existence. Florida used to be in this category.
70% Red: The Upper South. Different from the Deep South, but still very much Southern. Virginia and North Carolina used to be in this category.
60% Red: Texas. Though it's a mix of Southerners, Westerners, and Latinos, it was a Confederate state and it definitely isn't Yankee. It still fits.
50% Red: Border States. These states were never in the Confederacy, but they are partially or substantially Southern in culture and thinking. They definitely have more in common with the South than the North, especially now.
40% Red: In Danger of Yankeeification. They could end up like Virginia should they continue to slide in that direction. However, Florida north of Gainesville is basically part of the Deep South and not all Northerners are hostile to Southern culture. North Carolina outside of Charlotte has remained similar to the other Upper South states and has resisted slipping into Yankeedom so far.
50% Green: Yankified. Virginia was once Southern, but is no longer. The western and southern bits of the states may have remnants of Upper South and Appalachian culture, but the Northeast has assimilated it well.
90% Green: Always Yankee, at least after 1865. That they had slavery before the Civil War is all these areas have in common with the South. They are now as Northeastern as New York or New England.