National American Indian Council

The National Congress of American Indians is an American Indian and Alaska Native indigenous rights organization. It was founded in 1944 in response to termination and assimilation policies that the U.S. government forced upon the tribal governments in contradiction of their treaty rights and status as sovereign entities. Wikipedia*

On the C-SPAN Networks:
National American Indian Council has hosted 1 event in the C-SPAN Video Library; the first program was a 1991 Forum.