In 1864, when Nevada became a state, its citizens gave up all claims to unappropriated federal land and codified this in the state’s Constitution.
The Nevada Constitution states:
Cliven Bundy Has No Claim to Federal Land and Grazing | The Wildlife News
This link goes further in depth in the situation, including the 1934 Taylor Grazing Act, as well as the not one but two court orders to remove his cattle from that land.
This freeloading asshole has been grazing for free in trespass on public lands, in brazen defiance of two court orders, and the feds are finally doing something about it. Yeah, he's a real ****ing patriot.
Of course, Bundy's claim that he should be able to do what he wants with that land since his family has been there since the 1880s (16 years after Nevada became a state) is asinine, since if we're going with the "I was here first argument," then I think there's a couple of other ethnic groups that lay a wee bit earlier claim than you do, paleface.