"The most commonly reported ancestries of White Americans include English (12.5%), German (7.6%), Irish (5.3%), Italian (3.2%), and Polish (1.3%)...

The study concluded that English ancestry is the most common European ancestry among white Americans, with this component ranging between 20% (Wisconsin, Minnesota, North Dakota) and 55% (Mississippi, Tennessee, Arkansas) of the total population (regardless of race) in all 50 states."

Probably has a lot to do with population-density and age. 🤔 Or the map really is just made up.