From Guns.com:

The Constitutional Carry States’ Rights Act was filed last week by U.S. Sen. Mike Rounds, a South Dakota Republican, who stressed the state’s pending permitless concealed carry law could pose an issue for those passing near school zones. In short, the federal Gun-Free School Zones Act bans carrying firearms within 1,000 feet of a school zone, with an exception for those with a carry permit. Supporters of the bill fear that those practicing legal constitutional carry may not meet that exception.