#also i never realized ks borders just four states

[flavinbagel]

Something I've observed is that, without the water borders in the Great Lakes, this chart could still remain unholed. If WI extended all the way up, cutting off MN from MI, it still shows the Wis/Mich land border, but then for WI-IL-IN-MI-back to WI, filling the hole means these four have land borders one after the other, but no overlaps, creating a second four corners situation. In this way, Lake Michigan is replaced by an instantaneous point, but it still accurately shows land borders.

A topologist map of the US showing all state borders