I think the point of the column was that the Left is losing the national base as represented by state offices. The Left has fewer governorships and state legislatures since the 1920s, and so is top-heavy as depicted by Hillary Clinton's popular vote.
Clinton's popular vote is not translating to state control, which proves that her support is concentrated on the coastal megalopolises. That's a tough foundation on which to base a new rise of the Left.
-PJ
I agree; that is why I mention I take more comfort in the Congressional results.