The Republican Party will block any strict gun control, so it would be sensible to pass gun-control reforms in reasonable steps.
the White House could pass a law enabling gun ownership only for parents with children to protect, men that have earned a living for themselves, and adult females. All males without assets or children to protect should not be issued with a firearm, that includes single working males with less than 50k assets, and students.
Automatic weapons owned by civilians should be kept in a safe protected by a keycode known to the owner. large fines should ensue if automatic weapons are kept outside of a safe.
These reforms could put forwards in a national referendum, it would yield a significant portion of the women's vote, and could be successful.