They pledged mutual allegiance
We went back to "Undisturbed Isolationism". We cut ourselves off diplomatically for the most part from many European powers out of fear of being brought into another World War. America was completely and only about America.
Since this answer depends on where you live, I'll just make a nice little example you can go off of! My little home has representatives such as but not limited to Lou Barletta, Ryan Costello, Glenn Thompson, Connor Lamb, Brian Fitzpatrick, and my favorite of all Mike Kelly. If it troubles you too much google your nearby representatives and what they do individually! Good day