Use cartographic boundary shapefiles (to avoid Great Lakes states misshapen look)
The Great Lakes states like Michigan and Wisconsin look funky because the shapefile includes the lakes themselves. The Census Bureau released the Cartographic Boundary Shapefiles that are clipped to the land area, which helps eliminate this issue.
https://www.census.gov/geo/maps-data/data/tiger-cart-boundary.html
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Nick Kobel
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