Using the 24-hour rule, Massachusetts, Vermont, New York, Pennsylvania, Maryland, Ohio, Indiana, Michigan, Illinois, Tennessee, Kentucky, Virginia, North Carolina, South Carolina, Georgia, Florida, California, New Mexico, Arkansas, Louisiana, Colorado, Wyoming, Minnesota, Oregon. In Canada, just Quebec.
However, I feel if you’ve driven across a state, or made a day trip, or spent more than an hour, that counts; and by that metric, I can add Maine, New Hampshire, Rhode Island, Connecticut, Delaware, New Jersey, West Virginia, Alabama, and Mississippi in the east, and Washington, South Dakota, Arizona, and Wisconsin in the west. Also Ontario - though Windsor, so just barely - and the District of Columbia.
Clearly need to see more of Canada, if only to assuage @Northern_Piper’s wounded pride.