Most if not all native Americans were spiritualist. They observed a central or great spirit and also recognized minor spirits. Most observed the earth as a spiritual mother and also animals have a spirt of life, of sorts, which that do actually.
James Adair lived among the Cherokee in the late 1700's, and he says that they worshiped a being called "Loak Ishto Hollo Aba". According to him, Loak translates into holy, exalted, sacred, etc. Ishto Hollo translates into fire, and Aba means father, (it doesn't mean father in reference to anything else.) He was said to live above the clouds, therefore being the Great, Holy Father who lives in the Heavens.