From USA Today:

States that have been or are considering bills in current legislative sessions include Colorado, Iowa, Georgia, Kentucky, Maine, New Hampshire, Ohio, Oklahoma, Rhode Island, South Carolina, South Dakota and Virgina, according to the NRA.

South Dakota could be the fifth state to join the ranks of permit-less carry states. Lawmakers last week passed a measure allowing anyone 18 and older with a valid state driver’s license to carry a concealed weapon, as long as they don’t have a background that would otherwise prohibit them from getting a permit. The bill awaits action from Republican Gov. Dennis Daugaard.