The American model is more prone to be a melting pot where all the cultures in the nation assimilate into a common culture. The taco becomes as much a national food as the hamburger and hot dog. Increasingly, in the United States, the left wishes to employ a salad bowl approach, instead of a melting pot. The idea is that each culture lives together, but keeps strong distinctions between itself and the other. The lettuce may pick up the taste of the carrot while both are smothered in a common dressing, but they remain distinct.