An Obama-appointed federal judge has handed Marc Elias, the Democratic Party’s go-to election lawyer, another litigation loss after his law firm sought to stop a Wyoming law from imposing proof-of-citizenship and -residency requirements in the state’s voting registration process.

The civil complaint, filed in early May by the Elias Law Group on behalf of the Equality State Policy Center, unsuccessfully challenged the constitutionality of H.B. 156, an election security law requiring proof of United States citizenship and state residency when registering to vote in Wyoming’s elections.