I don't underestimate the sacrifices of the people of Puerto Rico to be citizens. I served in the military with many and they served wonderfully.
I am not saying that Puerto Ricans are not worthy. I just think the differences of language, culture and lifestyles are very different then the vast majoprity of Americans. Also the economic differences are vast. The idea of graft and corru[tion within police and populace are too different.
To bring the infrastructure to U.S. standards as well as the level life would be too great.
And to be honest, for what?
What advantage is there for the U.S.?
Well, "we" are already "here". The United States expanded their borders to include Puerto Rico in the year 1898. We were not let go like Cuba or the Philipines (who never were American citizens). It's too late for that.