A case is being argued before the U.S. Supreme Court about whether the grace period for mail ballots that arrive after Election Day should be allowed. If the court rules, it could leave 14 states who cast their votes by mail without a grace period. These states could be forced to adjust their voting rules before absentee ballots are sent out for the fall's midterm elections. The case could impact other states beyond the 14 states that give a regular ballot grace period, including 29 for the late arrival of military and overseas ballots. The Republican National Committee and the Libertarian Party of Mississippi have sued Mississippi Secretary of State Michael Watson, alleging that federal Election Day statutes envision a single day for casting ballots. Supporters argue that these grace periods violate federal law and hinder the integrity and credibility of elections.