You have to pay attention to what Duke says when he complains about the failed march. He really got annoyed the 'legal route' he took with his followers wasn't successful.
Duke counts a lot on the law. The gun lobby plays right into his plans. He seeks infrastructure that works for him. He is definitely seeking a path forward to find a way to claim the USA for white folks. Imagine him actually achieving his goal and ultimately only allowing albinos to live in the country.
It is time to take a close look at ALEC and discern what is working for Duke. ALEC is toxic to the entire country where these legislative measures find acceptance to enactment. THE ENTIRE COUNTRY. You can count on Duke coveting such an organization.