I recall an article that quoted Grant Shaft, back in the logo controversy of 1994-2011, where he mentioned that Notre Dame had "concerns with North Dakota's logo" and that was a sticking point with them considering the NCHC (presumably along with the TV contract discussions). Some postulated that the logo issue was the interlocking ND, and not the Sioux logo that was, by then, already listed as "to be retired". I'm not saying this was the reason Notre Dame went out East, just mentioning that I recalled the discussion. Perhaps the issue was over the Sioux logo..IIRC, Mr. Shaft did not elaborate in his statement at the time, merely saying "logo".