In just a few weeks, North Dakota residents will go to the ballot to vote on a total ban on high fence hunting operations. Ballot measure 2  makes the “killing or attempted killing of privately-owned big game species or exotic mammals confined in or released from any man-made enclosure designed to prevent escape” illegal.
The Wall Street Journal is running a solid article on the subject, it can be viewed here .
From the article:
On Nov. 2, North Dakota voters will decide on a ballot initiative that would do away with these ranches. What's surprising is that the battle over Ballot Measure 2 doesn't pit hunters against their natural adversaries, animal-rights activists, who have long opposed the ultimate blood sport. Rather, the debate is dividing hunters themselves.
If North Dakota passes Ballot Measure 2, it will join states like Wyoming and Montana that have heavy restrictions and bans on private game management.