The president-elect wrote that the coalition of non-Western countries “should expect to say goodbye to selling into the wonderful U.S. Economy” if it backs a currency other than the U.S. dollar.
I don't know if you noticed, but the B stands for Brazil and those 2 countries aren't exactly buddy-buddy. Treaties are more than their constituent members.
Russia wouldn't really matter in the equation. China, Brazil, Mexico, Canada would be the main players. They don't like each other, and have some serious diplomatic issues of their own, but could easily agree to stand together in self interest. Pulling in any other major US trading partners would also help all of them.