"Statehood is just a power grab for Democrats."
The partisan argument ignores 200 years of statehood history. States have been admitted in pairs to maintain partisan balance (Maine/Missouri in 1820), admitted by one party and gone on to vote for the other (Alaska was admitted by Democrats but voted Republican almost immediately), and changed partisan alignment multiple times over decades. West Virginia, admitted during the Civil War as a reliably Republican state, now votes overwhelmingly Republican — but by very different margins than predicted. Hawaii was expected to vote Republican and instead became one of the most Democratic states in the country.
The fundamental question is whether 3.9 million American citizens should have voting representation in Congress and full constitutional rights — not which party might benefit. If the partisan argument were applied consistently, it would mean no state should ever be admitted unless it benefits both parties equally, which would have prevented the admission of every state after the original 13. Representation is a right, not a partisan favor.
Puerto Rico's partisan leanings are far from certain. The island has a complex political landscape with local parties that don't map neatly to the mainland two-party system. Puerto Rico is culturally conservative on many social issues, has a strong religious and military tradition, and could easily become a swing state. DC's partisan lean is more predictable, but the democratic principle remains: taxing people without representation is the grievance that started the American Revolution.
More people than live in 20 existing US states — taxed without representation