Why democratic socialism is gaining popularity in the United States

The word socialism once struck fear in the United States, but presidential candidate Bernie Sanders and newly minted Congresswoman Alexandria Ocasio-Cortez have helped catapult it back into mainstream American politics. In CNBC's latest explainer, we try to answer what socialism means to different parts of the political spectrum and whether it's a fad or the future of politics in America.

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Why democratic socialism is gaining popularity in the United States