It's not uniquely American - the idea goes back to biblical times and Roman times, the phrase "Noblesse Oblige" was coined in the 1830's - but the US has long claimed that is a value it supports. When is the last time you heard the US base a policy on it, credibly - or under trump at all?
JFK said in his inaugural, "...let both sides join in creating a new endeavor, not a new balance of power, but a new world of law, where the strong are just and the weak secure and the peace preserved." Another way trump is the anti-JFK. Hey, Ukraine, give us some dirt on Biden, and it's all loans, and half your mineral revenues, and kneel, and say thank you some more. One word: Gaza.