The conservative opposition is to the automatic two Democratic Senators. Same as the Democrat opposition to splitting California into North and South - that would be two more Republican Senators. And, also, electoral votes. Nobody wants the other party to gain strength.

However, I must say, North California is considerably bigger than DC, both in area and population.

Neither has anything to do with DC representatives wielding a disproportionate amount of influence.

Although I think it was a concern at the time DC was created.

We may have to go to a Compromise of 1850 type of arrangement - admit in pairs, to offset each other.