US Vice President Kamala Harris will meet Singapore's leaders on Monday on the first working day of a trip to Southeast Asia aimed at bolstering ties as part of Washington's efforts to counter China's growing influence.

Harris will meet Singapore's President Halimah Yacob and Prime Minister Lee Hsien Loong and later visit the Changi Naval Base and tour the USS Tulsa - a combat ship of the US Navy.

Singapore is not a US treaty ally, but...