So, I've been doing some research on this and there seems to be several steps. First, the US has to have "control" over the "territory" which we've had all along. Then, the "territory" must "request" admission into the US. My understanding is that "statehood" is put up for a vote to the residents. I'm not aware of any of that but I didn't dig too deep. Then the territory must write their own constitution. Again, I'm not aware of one. Then both houses vote on it and it needs 2/3 majority for it to pass.

Please correct me if I'm wrong. Again, I didn't did too deep.