I've lived in Texas all my life, and I've NEVER heard that expression used.
But I bet ol’ Dan’s busier than a one legged man in an ass kicking contest trying to backpedal over that remark.
Anyway, having been raised in that environment, and having no real experience with black folks either save for that Ice-T video with the girl shaking her butt, I was entirely unprepared the day I saw a black guy at the side of the road selling watermelons from his pickup. I did a double take, burned a 180, and went back to get a closer look at this rarified specimen. Turns out he is a small farmer in the area. He sells what he grows, and at that point in the season, it was watermelon for sale. He works hard. I restrained myself for asking for a photo of him in front of his truck, (because that would have been awesome!) but I really did open my mind and learn something that day: Liberals from CA are close minded pricks!.
This occured on the road to Bryan, about 40 miles south, almost to highway 290. Apparently he is still there.