Be careful what you wish for lest your wish be granted.
Personally, I'd like nothing better than giving Puerto Rico full independence. The only reason why we kept the island after the Spanish-American War of 1898 was as a coaling station to refuel the Navy's Atlantic Fleet and a logistics base. Today's Navy has long since retired its coal burning ships and has retired Roosevelt Roads Naval Station and the Vieques Island training site. There's no reason to retain Puerto Rico as a Commonwealth.
Puerto Rico would never want independence; they could see their future in the poverty of Cuba and Jamaica. I’d have no problem pulling out, but I’d imagine a moral argument could be made against it.
I’d rather we make PR a state, then we can exchange this democrat state (which might lean R on occasion) for a split off of Colorado or California for Republican leaning state).