Those people are free to move to the us, free to petition to join as states. How do you think Hawaii and Alaska did it? I can move to those places. A better argument might be that poor people are actively disenfranchised by people they don't politically support.
These people live inside the United States. This is not some far off land these are people living in our nations capital we are talking about. They simply don't have voting rights due to politics so an area can be part of the United States but not a State.
