The Arizona Supreme Court has cleared the way for voters to decide on establishing open primaries. Proposition 140 already was printed on ballots that were mailed to some voters.

The Arizona Supreme Court rejected a challenge to Proposition 140, allowing voters to decide whether to replace the state's partisan primary elections with nonpartisan open primaries. State of play: The court Friday morning upheld a trial judge's ruling that dismissed a challenge arguing Prop.

Votes will be counted for an open primaries ballot initiative that has been the subject of whiplash-inducing court challenge, the Arizona Supreme Court ruled just 31 days before the election. The high court ruled on Friday,