This Las Cruces Sun News story says some county election officials may not obey the Secretary of State’s directive to add a straight-ticket device to the November 2018 ballots. Thanks to Rick Lass for the link.
UPDATE: the Albuquerque Journal has this September 2 editorial, saying that the straight-ticket device is not a good idea, because voters ought to be responsible enough to make an individual decision about each partisan race on the ballot.
FURTHER UPDATE: here is a memo sent to each New Mexico county clerk, setting for the case that the clerk should not put the device on the ballot.