Missionary Notes (Forbes, ND and Isabel, SD)

Occasionally I am asked by members of the Protestant Reformed Churches the point-blank question: is there a church political ground for the Forbes-Isabel churches to "withdraw" from the Eureka Classis? And the second question is: if any, what is the doctrinal reason for leaving the Eureka Classis? Eureka Classis has just met this summer in their "48th Annual Session" at Eureka, South Dakota, although they were incorporated as a corporate entity as late as 1928 under the Statutes of the State...