Johnson said his group was outspent 25-to-1.
O'Keefe said the alumni association spent about $250,000 on the campaign to retire the nickname, all through donations. His group is prepared to launch a similar effort against a possible constitutional amendment, but O'Keefe is calling on the nickname backers to stand down.
"All it does is hold the University of North Dakota hostage and create more division," he said.
Associated Press writer James MacPherson contributed to this report from Bismarck, N.D.
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