On April 26, a Montana state trial court removed Lawrence Van Dyke from the June 3 primary ballot, for the non-partisan election for Supreme Court Justice. As a result, only one candidate for that office, the incumbent, remains on the ballot. See this story. It is expected that Van Dyke will appeal to the State Supreme Court.
The basis for the decision is that the Montana Constitution requires candidates for judge to have been a active member of the Montana bar for the preceding five years. Van Dyke has been a member of the Montana bar continuously, but during part of the recent five-year period, he was on inactive status. Thanks to Mike Fellows for the link.