This mostly tends to come from people who have nationalistic quibbles, and who want to propose alternate "I will force a name onto you that expresses my attitude toward your country" schemes.
Also, it's an unsolvable problem, because there is no part of "United States of America" that is technically unique. It's not the only nation on the American continents, and it's not the only nation whose official name includes "United States" (Mexico does as well).
Also, it's an unsolvable problem, because there is no part of "United States of America" that is technically unique. It's not the only nation on the American continents, and it's not the only nation whose official name includes "United States" (Mexico does as well).