US Constitution, Article I Section 8 Clause 17:
"Congress shall have power …To exercise exclusive Legislation in all Cases whatsoever, over such District (not exceeding ten Miles square) as may, by Cession of particular States, and the acceptance of Congress, become the Seat of the Government of the United States, and to exercise like Authority over all Places purchased by the Consent of the Legislature of the State in which the Same shall be, for the Erection of Forts, Magazines, Arsenals, dock-Yards, and other needful Buildings…"

Article IV Section 4:
"The United States shall guarantee to every State in this Union a Republican Form of Government."

Article IV Section 4 Clause 3
"New States may be admitted by the Congress into this Union." Northwest Ordinance of 1787 (re-enacted under Constitutional authority 1789) defined that all new states appropriately admitted will enter the nation on an equal footing with the original 13 states.

We oppose any effort to confer statehood on the District of Columbia or any representation in Congress comparable to that of an independent state in the federal union.

We oppose efforts to confer statehood upon the Commonwealth of Puerto Rico or expand statehood beyond the current fifty states.

We acknowledge that each state's membership in the Union is voluntary.

We support the equal footing doctrine co-equal with the original thirteen states for all states coming into and having entered the Union as states.