A federal judge has dismissed the last remaining lawsuit challenging California political districts drawn by the Citizens Redistricting Commission.
U.S. District Court Judge Stephen Wilson concluded Thursday that he had no jurisdiction because the California Supreme Court previously rejected arguments made in the suit by a former Republican congressman and four others.
Mariposa Republican George Radanovich, who left Congress last year, was challenging the state's newly drawn congressional maps.
Radanovich contends that the redistricting commission violated federal voting rights law and the U.S. Constitution by seeking to protect three African American incumbents in the drawing of three congressional districts.
The state Supreme Court rejected similar arguments in October, without comment.
Jeanne Raya, current chairwoman of the redistricting commission, said that Wilson's action protects the panel's work against "baseless partisan attacks" and demonstrates that its districts were fair and complied with state law.
The 14-member redistricting commission consists of five Democrats, five Republicans and four independent or minor-party members. Map approvals required support from at least three members of each bloc.
Dismissal of the federal suit ensures that the redistricting commission's legislative and congressional districts will be used in this year's elections. Signatures have been filed in a referendum drive aimed at overturning the Senate maps for future state elections.