"Tomorrow will mark the 35th anniversary of the Schuman plan, which led to the European Coal and Steel Community, the first block in the creation of a united Europe. The purpose was to tie French and German and European industrial production so tightly together that war between them "becomes not merely unthinkable, but materially impossible." Those are the words of Robert Schuman; the Coal and Steel Community was the child of his genius. I believe if he were here today, I believe he would say: We have only just begun! I'm here to tell you that America remains, as she was 40 years ago, dedicated to the unity of Europe. We continue to see a strong and unified Europe not as a rival but as an even stronger partner. Indeed, John F. Kennedy, in his ringing declaration of interdependence in the Freedom Bell city of Philadelphia 23 years ago, explicitly made this objective a key tenet of postwar American policy; that policy saw the New World and the Old as twin pillars of a larger democratic community. We Americans still see European unity as a vital force in that historic process. We favor the expansion of the European Community; we welcome the entrance of Spain and Portugal into that Community, for their presence makes for a stronger Europe, and a stronger Europe is a stronger West."
January 1, 1970
https://en.wikiquote.org/wiki/European_Union%E2%80%93United_States_relations