On March 2, New Mexico Governor Susana Martinez signed HB 138. It lets 17-year-olds vote in primaries for all office if they will be age 18 by the general election. There are now 16 states that permit this for all office, and 22 who permit it for president. See this Ballotpedia list.
The New Mexico bill does not go into effect this year. Thanks to Doug Carver for this news.