How Do New States Become Part of the U.S.? — Plus More on U.S. Statehood

"The 51st state" is a phrase that refers to areas or countries that might become an additional U.S. state. Candidates include Puerto Rico, Guam and Washington, D.C. How likely is this, and how did the U.S. get the 50 it already has?

How Do New States Become Part of the U.S.? — Plus More on U.S. Statehood

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