Maine is one of three states that makes it extraordinarily difficult for members of small ballot-qualified parties to get on their own party’s primary ballot. The others are Arizona and Massachusetts. This news story explains the difficulty the Green Party is having this year, as it seeks to help its only candidate for U.S. Senate qualify for the Green primary ballot.

A lawsuit filed by the Maine Libertarian Party is currently pending against the Maine restriction, although the news story does not mention it.