What is stupid about this writer is that almost all of the territory of Washington is red. Seattle, Tacoma and Olympia are blue. That’s it. Good luck extending your liberal mandate across the cascades to eastern Washington. They would secede and either join Idaho or start their own state.
In 1981, WaPo writer Joel Garreau, a born Quebecker, wrote The Nine Nations of North America, about the significant differences among regions and their "natural" boundaries. The Pacific Coast, which he called "Ecotopia", extended from the Alaskan panhandle, inclusive, down to about San Luis Obispo. He saw consistent cultural affinities and geographic realities all along the coast which did not extend inland much farther than Contra Costa County in California but did comprehend most of San Francisco Bay and Puget Sound. In most places, though, the "nome" did not extend beyond the crest of the Coastal Ranges.