I remember reading an analyst who said, it was terrible for US reputation because other countries around the world, whether allies or arch-enemies, can rightly

I remember reading an analyst who said, it was terrible for US reputation because other countries around the world, whether allies or arch-enemies, can rightly say (I paraphrase) "Why should we trust any agreement we have with you, USA, when in your next election you can elect a ducking lunatic who'll cancel this agreement?"... It makes me think of Great Britain, who another thinker said used to be the adult in the room of global politics, whose advice other countries sought; but within a decade became a laughing stock that was ignored.