The Maine Democratic Party will hold a state convention to choose a new nominee for U.S. Senate. The party hasn’t announced the date of the convention, but it must be held before July 27 to meet the election law deadlline. The party already had one state convention this year, on May 1-2. The process by which the party is settling the details is similar to how all U.S. political parties operated in the 19th century, when parties were more independent of state election laws. It is also a process that resembles how political parties in other nations operate.