The Arizona Republican Party is relying on “stray” language in the Arizona Constitution in what attorneys describe as a longshot challenge to overturn the state’s 31-year-old early voting law.

A lawsuit filed earlier this week by the AZGOP and one of its officials argues that a provision in the constitution stipulating that “electors may express at the polls” means that voting must be done in person, not by mail, as Arizona’s no-excuse early voting law allows for.…