All the US government has to do is to revalue the Treasury’s gold enough that they can use it to pay off the debt and still have backing for the “new dollar”. This will probably require some kind of subsidy for the electronics industry because otherwise they wouldn’t be able to afford gold needed in circuitry, and similarly for other industries that absolutely must have gold to function. But that is a minor problem compared to either declaring bankruptcy or destroying the remaining value of the “dollar”, which are the other possibilities.
Of course they also have to close down the Fed, guarantee 100% gold backing for the “new dollar” and balance the budget, preferably with constitutional amendments to ensure that all of those changes stick. Fortunately, after the next general election cycle in 2018, if Trump does reasonably well and the Democrats continue with their “strategy” of throwing a constant tantrum about absolutely everything he does, it’s possible there will be enough Republicans in Congress and the state legislatures to put those Constitutional amendments through quickly.