How do you define "first-class citizenship"? If it involves having voting representation in the House and Senate, there is no current mechanism other than state

How do you define "first-class citizenship"? If it involves having voting representation in the House and Senate, there is no current mechanism other than statehood. Also, how do you handle the 10th Amendment? Which says powers not delegated to the federal government are reserved to the States or the people. Territories are messy and we can do better.