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..
Colorado really should be the cutoff yes, since they could run supply lines from Kansas/neb to Denver at least. AZ/NV make zero sense. I dont have a problem with Alaska and Hawaii since that could just be from the pacific fleet forces in hawaii staying loyalist, Alaska's large military installations and isolation would also work in favor of a loyalist faction holding strong. In theory a DC led government has more international legitimacy as well.
