MANILA, Philippines (AP) — Vice President Kamala Harris is visiting the Philippines to underscore America’s commitment to defend its treaty ally. The trip will involve flying to an island province facing the disputed South China Sea, where Washington has accused China of bullying smaller claimant nations. A senior U.S. administration official said that after attending the Asia-Pacific Economic Cooperation summit in Thailand, Harris will meet President Ferdinand Marcos Jr. on Monday to reinforce security and economic ties. Then on Tuesday she’ll fly to Palawan province, which faces the South China Sea, to meet the coast guard and fishermen. China’s claims to virtually the entire South China Sea has put it on a collision course with the U.S. and its smaller Asian neighbors.