Chi Osse, one of the City Council’s most progressive members, has spoken in recent years about how voting for Bernie Sanders in the 2016 presidential primary was a formative experience for him politically.

But there’s a catch: Osse didn’t back Sanders at the ballot box in 2016 because he wasn’t even registered to vote at the time, according to records unearthed by the Daily News.

The revelation comes at an awkward time for Osse, who is seeking an endorsement for a potential 2026 congressional run from the Democratic Socialists of America , the influential left-wing group that counts Sanders as one of its champions.

Osse was expected to appear Wednesday night before the DSA’s Electoral Working Group to make the case for why the group should back his 2026 primary challenge against Co

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