They’ll need to disconnect from the Federal Reserve to pull this off. Which will not happen without a war.
Not necessarily, we had a gold standard within our currency while the Federal Reserve existed. Either way, we would need something that would regulate value to prevent external forces from manipulating our economy via dumping on or withholding supply. Imagine going to war with South Africa and, to wage the battle, they dump several trillion dollars of gold into the system. South Africa, Bolivia, Uzbekistan, all countries that could hold us financially hostage if we don’t do this properly (start by increasing domestic sourcing).
IF we where going to go to a single commodity based currency, I think Silver would be much better. More is mined domestically in relation to other countries.