This census seems to only include "denominational" Baptist church bodies and does not include the blessed "Independent-Fundamental-Bible-Believing" Baptist churches.
Any way, this map portrays what we are already thinking. The evangelical/fundamentalist movement is directly associated with conservative politics.
My good friend Joel asks, "In a more general sense, is conservative, American thinking bound up tightly in the Christianity of Baptists?"
I would answer emphatically in the affirmative.