Minnesota (first)

Iowa, Michigan, Dakotas, Nebraska, Wisconsin, Kansas (nearby)

California, Texas, Florida, New York, New Jersey, Ohio, Illinois (well populated)

Louisiana, Alabama, Mississippi, Georgia, Arkansas (Southerners travel)

Indiana, Pennsylvania, Tennessee, Kentucky (big enough)

Kansas, Arizona, Missouri, New Mexico, Oklahoma (close enough)

Heading west, Colorado, Montana, Wyoming, Idaho, Utah, Nevada, Oregon, Washington (easy)

Conversely, New Hampshire, Connecticut, Rhode Island, Vermont, Maine, Maryland, Massachusetts (rare treats)

Hawaii (Mount Rushmore, a long drive from Honolulu)

Throw in Alaska, two Carolinas, two Virginias; only one remains.

In a parking lot unremarkable to anyone else, a license plate declares ironically, "Delaware, The First State".

Fifty!