Of course, that the whole thing is exuding libertarian ideology through every paragraph. "PS: If the US could afford to back the USD with Gold, then there would be no need to run a $2 Trillion annual budget deficit."
I would say that it would not be possible for them to run a persistent trade deficit as gold would be leaving the country to pay for them, which of course would force the country to have to save much more.
They can declare the USA libertarian dollar fixed to a certain quantity of gold and then, pardon me tor saying this, use the power of the state to force all prices to be fixed in terms of it with the option of payments being done with normal dollars.
Alternatively, pardon me again for saying this, they may use paper gold, or confiscate the real thing from the gold bugs, or declare Canada and Australia their territories, or yet to limit the whole thing to whatever state they intend to move Wyoming, I think.