Conversation so far:
What is the type of government in Guam
Guam is a presidential representative democracy, whereby the Governor is head of government, and of a multi-party system.
Who is Guam's governor at the moment
The current governor is Lou Leon Guerrero, a Democrat who was inaugurated on January 7, 2019 following her election in 2018.
Where is Guam's territory
The Mariana chain of which Guam is a part is the closest land mass to the Mariana Trench, the deep subduction zone that runs east of the Marianas.

Question: Is the territory part of U.S.
Self-contained rewrite: Is the territory of Guam part of the U.S.