This is not the first plebiscite in which Puerto Ricans vote to decide the island's political status. The last vote was held in 1967 and that vote, like this one is non-binding because it's still the US Congress that has the final word on the political future of Puerto Rico. Two years ago, a bill calling for a congressionally-approved vote failed to get through a Senate committee, and what's significant about this election says political analyst Juan Manuel Garcia Passalacqua, is that this vote is actually a petition to Congress by the Puerto Rican people, made under the Right to Petition clause of the First Amendment of the US Constitution.