President Polk, AP-103, was a President Jackson-class transport. She is an AP, not an APA. Newport News Shipbuilding laid her down on 7 October 1940 (Maritime Commission hull 110) and launched her on 28 June 1941, Miss Patricia Kennedy sponsoring. She was delivered to American President Lines in 1941 and ran in the Pacific under government charter. The War Shipping Administration acquired her on 5 December 1941, with American President Lines operating her as its agent.
Before she was a Navy ship she made an urgent run. She left San Francisco on 19 December 1941 with a tanker and two freighters and reached Brisbane on 12 January 1942 with 55 P-40E fighters, 4 C-53 transports and 55 pilots, plus ammunition, torpedoes and rations. She went on to Soerabaja, arriving on 30 January with ammunition, bombs, aircraft and rations for Java. Of eight vessels planned for the relief of Java, only President Polk and the chartered Dutch ship Bloemfontein arrived before the island fell on 9 March. From 6 to 11 August 1942 she carried 7 officers and 433 men of the 7th Naval Construction Battalion from Samoa to Espiritu Santo.
The Navy acquired her on 6 September 1943 and commissioned her at San Diego on 4 October 1943. She carried construction battalion men to Pearl Harbor, then went to Tarawa on 16 November 1943, where she unloaded and acted as a casualty receiving ship. She left Pearl Harbor on 22 January 1944 with troops for Kwajalein and again served as an emergency hospital ship, carrying casualties to San Francisco, where she arrived on 24 February. She landed troops at Lingayen Gulf on 11 January 1945, carried Marines from Iwo Jima, and left San Francisco for Okinawa on 24 July.
She joined Operation Magic Carpet on 13 October 1945. She was decommissioned and handed back to the War Shipping Administration on 26 January 1946 and struck on 25 February 1946. She earned six battle stars. She ran for American President Lines until she was sold on 15 July 1965 and renamed Gaucho Martin Fierro, then Minotauros in 1966. She was scrapped at Kaohsiung in 1970. No NavSource page was found for her, so this account rests on the Wikipedia article built on DANFS.