This idea of "libertarian" states is misleading.
Idaho, Montana, and Wyoming... the GOP has an authoritarian fundamentalist wing and a libertarian wing in Colorado. Nevada outside of Greater Las Vegas and Reno-Sparks-Carson City, but that is not enough to swing Nevada.
The GOP continues to face a Blue (Atlas Red) Firewall hostile to its main constituencies. The Republicans need utter failure of the Democrats in economics or foreign policy; the Republicans are much more likely to have that happen to them because they are much more reckless.