Given the history of the country, one would think it would be impossible to further offend Native Americans. But President Trump is still willing to try. His latest effort came, as usual, via tweet. “If Elizabeth Warren, often referred to by me as Pocahontas, did this commercial from Bighorn or Wounded Knee instead of her kitchen, with her husband dressed in full Indian garb, it would have been a smash!” (Wounded Knee is old news. Let’s talk about Spurred Heel.)