How about Guam?

Make Mine 25 “   Still Life With Robin: Statehood for PR, Statehood for DC by Peggy Robin The good news is that talk of a 51st state is back in the news. The bad news for us is that the focus is on Puerto Rico, not DC. For the first time a majority of Puerto Ricans are in favor of statehood: CNN: Puerto Ricans Favor Statehood For the First Time. However, it's entirely possible that the surge of interest in a 51st state could be converted into good news for DC as well. Among the many reasons that DC has been frustrated in its attempts to gain the benefits of statehood for its citizens are three seemingly trivial but widely, even stubbornly, held arguments: 1. That "50 states" is a nice round number and we should stop there. 2. That the nicely symmetrical design of the field of stars in the US flag would be thrown out of whack by any additional stars. 3. That DC would no longer be the District of Columbia but would get a ridiculous new name, "New Columbia" if it became a state. Statehood for Puerto Rico could work to counter all three of these arguments. [I'd rather suck the carbuncle on Janet Napolitano's ass] 42,672 words (not written) go here. ”