It's a fascinating hypothesis, but its overstated, in our view.
Blue state migration helped Obama win Colorado, Florida, and Virginia in 2008 and 2012
California, a state known for its beaches and love for all things liberal has taken a step back in representing one of those factors, and no the ocean hasn’t taken over the beaches (yet!!).
Being a native of Atlanta, I always resented media depictions and popular culture images of Georgia as a state where everyone wore overalls, had three teeth in their head, and liberally used terms like "ain't" and "gonna" in their daily vocabulary.
At the 2004 Democratic Convention, Barack Obama was introduced to the world. His most well-known statement from that speech remains “There are no red states or blue states, just the United States.”
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