How long did communism last in the US?

Zero years as Communism has never been an accepted mode of government within the US. Karl Marx, the acknowledged founder of what we know today as Communism lived from 1818 to 1883. His notions of Communism formed in the early 1840s and ultimately culminated in him writing the Communist Manifesto in 1848 along with Friedrich Engels. Marx is further known for his written works attacking the capitalistic system. There is a minor Communist Party of the US (www.cpusa.org) but they have never managed to field a major political candidate for government office. So - there have been small communist groups in existence in the US for the last century some of which still persist today.