A little "back story" on how/why the DFC charge (delivery freight charge) was originally standardized throughout the country.
Prior to the mid/late 1970s, dealers closer to the factory paid a much lower DFC then dealers further away -- even when selling the identical car or truck. Dealers closer to major automotive factories were happy, for often customers would drive hundreds of miles to go to those "close in dealers" and pay less for the identical vehicle than from a dealer located in their home town. Remember my Dad doing exactly that.
Clearly there were a small number of happy, "close in" automotive dealers, and a huge number of unhappy ones (losing customers to dealerships right near/next to factories).
Majority rules, and has a consequence it became a national platform of the National Automotive Dealers Association (NADA) to eliminate this competitive disadvantage/advantage (depending on where your dealership and your factory were located). NADA went to the US Congress and got a law passed that nationally-standardized vehicle delivery charges for each type of vehicle. Believe that law was passed in 1978. It has, as you can imagine, interesting consequences. For example, if you currently live in Hawaii, you pay the same $995 delivery charge for your 2015 Corvette as does someone who lives in Bowling Green.
(This is a history "back story" only post, not a political one. Hint, hint.)