From the Overview: "The United States and the Republic of the Philippines maintain a deep relationship that includes a bilateral security alliance, extensive military cooperation, close people-to-people ties, and many shared strategic and economic interests. U.S. administration of the Philippines as a colonial territory (1898-1946), which followed 300 years of Spanish rule, also shaped the relationship. Bilateral relations have faced challenges under President Rodrigo Duterte, who has long held negative views of the United States. Elected in 2016, Duterte has pursued rapprochement with China and a violent extrajudicial antidrug campaign. Major areas of U.S.-Philippine cooperation, nonetheless, have continued."
CRS In Focus, IF10250
Congressional Research Service: https://crsreports.congress.gov/