>>2053397Western Americans have rhotic accents, which means they enunciate the letter r more than Eastern accents, which tend to be more non-rhotic (Archie Bunker from All in the Family and Bugs Bunny are good examples of this). Received Pronunciation and the Cockney accent are British examples of non-rhotic accents.
This is not to be confused with rhotacism, which is a speech impediment based awound the inability to pwonounce the lettew r (Elmer Fudd is a good example of this, looking up Isaac Arthur on youtube also works).