“My politics were to the left of the Democratic party but I didn’t realise there was an entire ideology, an entire movement that was there. It had never occurred to me,” said Katbi. “Bernie was my introduction to the concept of democratic socialism. It’s not like I associated it with the cold war. It was a new concept to me completely. That was the case for a lot of millennials, which is why the movement has grown so much.”

Katbi, who works at an organization helping to settle immigrants and refugees in Portland, Oregon, became “socialist curious”. She joined the Democratic Socialists of America (DSA), a rapidly growing big-tent movement that has drawn in former communists and fired up millennials. The DSA is now the largest socialist organization in the US as surging membership, which has quadrupled since the election to around 25,000, has breathed new life into a once dormant group. New branches have sprung up, from Montana to Texas and New York. Earlier this month, hundreds of delegates gathered in Chicago for the only DSA convention in years to attract attention.