States depicted in white should be considered ungrouped, and should not be considered grouped together. Color selection for the various groups is arbitrary.
A little hard to tell with this resolution: Massachusetts and North Dakota form a group unto themselves (I didn’t want to use solid black for a group color). Also just a little hard to tell: Rhode Island is solid blue, like groupmate Wisconsin; Delaware is white and therefore ungrouped.
Of the non-state territories, only the District of Columbia would be grouped if it were a state, and if so it would belong in the group that includes its neighbor, Maryland.