For those who like to analyze diplomatese, this statement by US Secretary of State Hillary Clinton would be interesting,

    “The United States has no territorial claims there and we do not take sides in disputes about territorial or maritime boundaries,” Clinton told foreign ministers gathered in Cambodia’s capital. “But we do have an interest in freedom of navigation, the maintenance of peace and stability, respect for international law and unimpeded lawful commerce in the West Philippine Sea.”

Note that she used West Philippine Sea instead of South China Sea.