I don't really get how the Loyalists maintain their western states. The logistics are terrible (I don't think there is even a direct rail link between Arizona/Nevada), Hawaii/Alaska are cut off from the Loyalists with no Loyalist continental US coastline/ports on the Pacific, and depending who is who's enemy (are they all fighting each other or is the color shading accurate?), that could be one massive pocket from Nebraska/Kansas-west for the Loyalists, which is extremely vulnerable to being cut off from the east.
Even if you come up with some alt-reality political system that supports that map, there are still basic problems with sustaining the economic and military potential of these regions..
That's what I was thinking too. There is no realistic way for Nevada and Arizona, not to mention the non-contiguous states, to last more than a few months at best before falling to the enemy forces, even if the central government has a huge military/technological advantage (which from what I understand isn't the case at all).
