"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America."

这段话赋予政府的目的-为美国服务-  domestic;  ourselves and our Posterity.

美国优先不仅完全合乎伦理, 更是宪法赋予政府的目的.