Puerto Rico

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Last Tuesday Puerto Ricans cast a public opinion vote to become the 51st state. But what does that mean for those voters and for the rest of the US?

Christina Duffy Ponsa is a law professor at Columbia University and the co-editor of "Foreign in a Domestic Sense: Puerto Rico, American Expansion, and the Constitution." She joins us to talk about Puerto Rico's current status and how things might change with this vote.