IF the district system did go nationwide, it would probably look very different than it does now. For example, what about smaller states like Washington, Oregon, Idaho, Alaska, Montana? You can't run a district system in a state with 3 teams, can you?
I would imagine larger states like CA, MI, TX, etc would become their own district systems and then large groups of smaller states like the ones listed above will become their own.
The western region would probably look something like:
- CA
- Pacific Northwest (WA, OR, ID, MT, AK)
- Southwest (NV, AZ, NM, CO, UT)
Each group would have their own district systems until the need for district realignment came up.