noun which may take the genitive case particle 'no'
toward the US; with the US; US-related
Used as a prefix-like modifier in compounds and noun phrases to indicate direction, relation, or policy toward the United States. Common in news, diplomacy, and economic contexts.
The trade deficit with the US is widening.
The government announced a new policy toward the US.
対米 concerns the United States specifically, whereas 対中 concerns China, though both follow the same 対〜 prefix pattern that can confuse learners.
Compound of 対 (たい, 'toward, versus') and 米 (べい, abbreviation for 米国 'America'). The use of 米 for America comes from the second character of 亜米利加 (アメリカ), an old ateji spelling.