The United States is not a nation. From the very beginning it was more of a collection of various nations united by ideas of political unity and by fairly high levels of tolerance for other groups within that union. The US certainly contains nations, but it was never a single nation.
The workers were never enthusiastic about socialism. Socialism was brought to the masses by intellectuals of bourgeois background, dining and wining together in the luxurious London homes and country seats of late Victorian "society."
The British complained of unfair competition from goods supplied by the American colonists. So the state intervened to manage trade and make it "fair." But the American revolutionaries saw protectionism for the scam it was, and still is.