Originally Posted by
cyccommute
Perhaps not officially but I dare you to show how the plains of Colorado and Wyoming are different than the plains of Nebraska and South Dakota. Or how you can see a stark dividing line between Oklahoma and Texas at the Kansas border. Or how Arkansas changes dramatically at the Missouri border. There might be a sign saying that there is a boundary there but climate, terrain, and biome don’t recognize artificial boundaries.
Redefining what is meant by “Midwest” does not make your original statement any more credible.