The damage is done and has shown to trade partners that you cannot rely on fair and consistent trade agreements with the US; as a trade partner, if they don't decouple from them as quickly as possible, they'll be held hostage at the whims of the US political winds and be in perpetual peril of "I'm altering the deal. Pray I don't alter it any further."

Seems a reasonable question to ask what's fair about the US paying out some $850 billion for defense when it seems pretty damn nigh impossible to get partners to pay their share? In some cases politicians would rather fund bread and circuses for the voters who then keep them in power.