Adm. Samuel Paparo cautioned military aid for the countries could hamper America's ability to respond to China should a conflict arise in the Indo-Pacific.
U.S. Marines and their Filipino counterparts have staged joint combat drills near southern Taiwan, a flashpoint in the Washington-Beijing military rivalry.
Congress has passed an $825 billion FY24 defense spending bill, but the plan to get Ukraine military assistance across the finish line remains uncertain.