Why do you think socialism never found widespread support in the united states?

Fear of communism, the American tradition of self-reliance, political opposition from the wealth/business interests.

Taking care of poor/vulnerable people, reign in abuses of big business and private wealth.

High tax burdens if programs become too generous, a risk that people would lose incentive to work hard

the us hoped to prevent any nations from leaning towards soviet union-based communism. the containment policy was established in hopes of keeping communism from spreading to new places.