Minnesota Drop SC and Adds CT, HI, and OH Permit Recognition
As directed by Minnesota Statute 624.714, MN DPS conducts an annual review to determine which other states have laws “similar” to Minnesota in order to determine what out-of-state permits will be honored in Minnesota.

Apparently during this annual review DPS determined that South Carolina no longer makes that cut while Connecticut, Hawaii, and Ohio now do make the cut for some reason.
According to MN DPS, South Carolina was removed because it now allows permit applicants to be 18 while Minnesota Law requires all applicants to be at least 21 years old, without exception.
Many states have found they can just choose to honor permits from those 21+ in states like South Carolina but it seems MN DPS doesn't see that as an option to them in the current structure.
Sorry South Carolinians your home state permit is no longer valid in Minnesota.
CO is Colorado not Connecticut. Which one is it?
Kathie, thank you for catching my mistake. I live in Colorado so I think my fingers were acting without my awareness. CT/Connecticut is the state referenced here. Fixed above.