Kamala Harris will become the first U.S. vice president to visit Vietnam next month during a trip that will also include Singapore and is aimed at rallying international support to counter China's growing influence.

Harris will discuss regional security, the global response to COVID-19, climate change, and "our joint efforts to promote a rules-based international order," said spokesperson Symone Sanders.

Former U.S. foe Vietnam has emerged as a key U.S. partner and a vocal opponent of China's territorial claims in the South China Sea. Harris' trip will follow one that Defense Secretary Lloyd Austin made this week to Hanoi.