McConnell calls granting statehood to D.C. and Puerto Rico, “full bore socialism.” pic.twitter.com/LXi71EMtDV— Resistbot (@resistbot) June 17, 2019
So, when we went from the original thirteen to fifty states, what the hell would Mitch McConnell call that? (Maybe we've always been socialists?!) But I think McConnell clearly sees a distinction from how the United States expanded its map via manifest destiny to what statehood for Puerto Rico and D.C. entails, and it's all of a piece with the GOP's love of gerrymandering and voter ID laws.
But, of course, socialism is just a "dirty word" to sling around meaning "a thing Democrats would like".