Politics of Guam
Guam is a presidential representative democracy, whereby the Governor is head of government, and of a multi-party system. Guam is an organized, unincorporated territory of the United States with policy relations between Guam and the US under the jurisdiction of the Office of Insular Affairs.
United States nationality law
All persons born in the island of Guam on or after April 11, 1899 (whether before or after August 1, 1950) subject to the jurisdiction of the United States, are declared to be citizens of the United States.