JUNEAU (AP) — A proposal from Gov. Mike Dunleavy’s administration to split in half the Alaska Department of Health and Social Services — the state’s largest department — appears likely to take effect later this year. House and Senate leaders said it does not appear there are enough votes to block the move.

Reorganization of the department, with more than 3,200 positions, has been billed as a way to improve operations and delivery of services. The proposal came through an executive order from the governor, and rejection of the order would require a joint session and support from 31 of the Legis...