Secretary of National Defense Kangleon became Leyte's civil governor upon the re-establishment of the Philippine Commonwealth under President
Osmeña. On May 28, 1946, he was appointed Secretary of National Defense by President
Manuel Roxas, the first of the Commonwealth and the Republic of the Philippines, in the same way that Kangleon was the Defense Secretary during the closing American colonial rule and held the position upon the declaration of independence on July 4, 1946. But due to policy differences with the next president,
Elpidio Quirino on the leadership of the
Armed Forces of the Philippines, Kangleon resigned as Defense Secretary on August 31, 1950. Kangleon was trying to ask President Quirino to remove the generals whom he considered deadwood to which the President disagreed.
Senate Kangleon's resignation from the Cabinet paved the way for his entry into the politics. Kangleon ran for Senate even without the endorsement of the incumbent President Quirino. He became senator and was appointed chairman of the Senate Committee on Veterans and Military Pensions and vice chairman of the Committee on National Defense and Security. He championed the cause of the Filipino veterans by filing bills and resolutions for their welfare and advancement. However, even before he could finish his six-year term in the Senate, Sen. Kangleon succumbed to myocardial infarction on February 27, 1958, exactly a month away from his 68th birthday. The Filipino nation led by President
Carlos P. Garcia mourned his untimely death. Sen. Kangleon was buried at the
Manila South Cemetery on March 4, 1958, and was reinterred in his hometown of Macrohon, Leyte on February 27, 1994. President
Fidel V. Ramos promoted Kangleon to Brigadier General of the Philippine Army posthumously in 1997. ==Memorials==