From left: Ald. Byron Sigcho-Lopez (25), Ald. Daniel La Spata (1), Ald. Rossana Rodriguez-Sanchez (33), Ald. Jeanette Taylor (20) and Ald. Carlos Ramirez-Rosa (35) [Chicago Democratic Socialist Caucus]

Ald. Carlos Ramirez-Rosa (35) welcomed an outpouring of support from some activists and organizers after he and four of his colleagues announced they were chartering the City Council’s Democratic Socialist Caucus on Saturday.

But others were confused, he said.

“Some people were like, ‘I thought you already had a caucus — what’s the big deal?’” Ramirez-Rosa said.