Neko,
I see the Alt-right as very very similar to the sovereign militias. 
Neiwert has done much research and writing about them. These include the skin heads, the neo-nazis and many other white supremacist groups. They exist in every state but are very prominent in Idaho. 
As I read some of their manifestos they show to be very nearly the same as most Republicans. God, gays, guns and abortion are their main issues. White supremacy, fear and intimidation are additional hallmarks. War on everyone is their agenda. They believe that their sovereignty means they obey no laws but their own. Also that they owe taxes to no one.