The territories should not be able to vote in federal elections. They are not states and don't have that privilege. As the poster above said, not only is it unconstitutional, but also states have more rights, and this is one of them.
That being said, I pretty much support the big five territories, especially Puerto Rico, becoming states.
Admitting the territories as states is a good idea for Dems to mitigate their long-term disadvantage in the Senate.
GOP would benefit the most from this IMO, they are proven strong especially in the NMI where there isn't even one democrat in the legislature.
The District of Columbia should become a state before any of the territories.
Also, respectfully, the argument could be turned around, for the Virgin Islands's legislature has no Republicans in it.
I like the idea of statehood regardless of who would benefit in Congress (unless that would be the only reason the territory would want to become a state, which is unlikely).
I agree, our country should not support a century old imperialism system that keeps many of these places so impoverished.
But I was just pointing out that the theory that making all these territories states "would only benefit democrats" as false. Some of these future seats in my opinion would be some of the hottest contested, especially in the pacific region.