That pic of Alaskan voting demographics convinces me that a Palin challenge to Murkowski will not work. (Visually confirms some comments by Alaskan friends.)
Curiously, in addition to a Republican governor, Alaska has two Republican senators and a very long-serving Republican representative in Congress, but all three tend well into the "moderate" RINO range of conservatives.
You'd suppose that a state so full of rugged individualists would want Federal government out of their hair, but maybe they see strong government as a defense against known & unknown dangers.
Anyway, in hindsight I share President Trump's and most FReepers' disdain for John McCain, but still think of Sarah Palin as one of the best things he ever did.