A leading conservative group is recommending a hatchet be taken to the Energy Department by shifting more than half of its duties to the Pentagon and leaving it in control of only cybersecurity for the electric grid.

The Heritage Foundation, in releasing its 2017 “blueprint” for the next administration, is suggesting a proposal that has been considered for years, but never acted upon, to move the Energy Department’s nuclear weapons and Cold-War cleanup programs to the Department of Defense.