A Minnesota Democratic committee on Thursday revoked the party’s endorsement of mayoral candidate Omar Fateh, a democratic socialist challenging the incumbent Democratic mayor of Minneapolis.

The decision to strip Fateh of his endorsement came after incumbent Minneapolis Democratic Mayor Jacob Frey challenged the DFL’s voting process.

Omar Fateh, a self-described Democratic socialist, was endorsed by the Democratic-Farmer-Labor Party during its July convention, making him the first Minneapolis mayoral candidate in 16 years to