They own too much land now.
Check it out:

It’s the most powerful agency you’ve never heard of — at least, until recently.

The Bureau of Land Management, the nation’s biggest landlord, found itself in the spotlight after a high-profile brawl with Nevada rancher Cliven Bundy and another dispute with state officials over the Texas-Oklahoma borderlands.

But the seemingly obscure agency, which is in charge of millions of acres of public land, is no stranger to controversy. History shows the power struggle over property rights and land use is one that’s been fought — fiercely — ever since the bureau was created.

In the nearly seven decades of its existence, the BLM has struggled to find its footing and exert its power, pitted against a vocal states’ rights movement.