Isn't DC a district? And Puerto Rico an unincorporated territory? As in, both would need to be converted to states first, and in the process lose some benefits a lack of statehood provides. (At least in the case of PR) For DC there is a legal argument that can be made that it shouldn't be one due to being the seat of the government and under direct rule of congress. at least from my reading up on it.

But yeah, the citizens deserve representation as well.