Original:  Other U.S. states totaling 20 Alaska, California, Connecticut, Delaware, Florida, Hawaii, Illinois, Maine, Maryland, Massachusetts, Michigan, Minnesota, New Jersey, New York, North Carolina, Oregon, Rhode Island, Vermont, Washington and Wisconsin, plus the District of Columbia have raised the minimum above the federal mandate.
Revised:  A total of 20 other U.S. states totaling 20 Alaska, California, Connecticut, Delaware, Florida, Hawaii, Illinois, Maine, Maryland, Massachusetts, Michigan, Minnesota, New Jersey, New York, North Carolina, Oregon, Rhode Island, Vermont, Washington and Wisconsin, plus the District of Columbia have raised the minimum above the federal mandate.
Edit intent: clarity