The Minnesota Supreme Court has ordered that Democrat Al Franken be certified as the winner of the state's long-running Senate race.

The high court rejected a legal challenge from Republican Norm Coleman, whose options for regaining the Senate seat are dwindling.

Justices said Franken is entitled to the election certificate he needs to assume office. When Franken is sworn in, he'll give Democrats a big enough majority to overcome Republican filibusters.

Coleman hasn't ruled out seeking federal court intervention.