Speaker of the US House of Representatives Nancy Pelosi (left) and Ukrainian President Volodymyr Zelensky at a meeting in Kyiv on May 1, 2022. Photo: AFP/VNA

This is the second high-level US delegation to Kyiv, following a visit in late April by Defense Secretary Lloyd Austin and Secretary of State Antony Blinken.

Most recent high-level visits by Western leaders to Ukraine were kept secret until the last minute, only being announced after the event had already taken place or the delegation had arrived.