If I had to write it, I'd start by trying to define the terms. "own" is linked to property rights, so it must refer to ownership of things that make the "material" America: goods, land, money, services, intellectual property, etc... Clearly there isn't a single entity that "owns" all of this. Each of those categories of property will be owned, in differing proportions, by the US government, corporations, individuals, foreign nations, etc. Since its a business class, you should obviously put an emphasis on the financing of all this, who provides the funds to keep it all going, investment vehicles, banks, pension funds, both at home and those from abroad.
And then you'll conclude that America is owned by a myriad of financial interests, some from abroad, some from home, some you vote for, some that are just born there, etc...