What is the correct form for citing the United States as a party in a case according to the Bluebook?

The correct form for citing the United States as a party in a case, according to the Bluebook, is "United States." This format is the standard and most recognized way to refer to the country in legal documents and citations.

Using "United States" provides clarity and formality, which is essential in legal writing. This designation eliminates any potential ambiguity that could arise from using abbreviations or informal terms.

Other choices, such as "U.S.A." and "USA," might be common in everyday speech or informal writing, but they do not adhere to the specific citation rules outlined in the Bluebook. "United States of America," while technically accurate, is generally considered too verbose for legal citations where brevity is often preferred. Hence, "United States" strikes the right balance between formality and clarity in legal contexts.