- Source: 2016 Puerto Rico Democratic presidential primary
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The 2016 Puerto Rico Democratic presidential primary took place on June 5 in the U.S. territory of Puerto Rico as one of the Democratic Party's primaries ahead of the 2016 presidential election.
Clinton was a heavy favorite to win the territory's primary. In her two terms as United States Senator from New York, the state with the largest population of Puerto Rican-Americans, she gained a strong degree of familiarity with the island. Those connections helped her build institutional support from top Puerto Rico Democrats, including then-Governor Alejandro García Padilla.
No other Democratic or Republican primaries took place on the same day. The Republican Party's Puerto Rico primary took place on March 6, 2016.