Not sure about the motive, but you got to admit it is funny,

[archives]

"Obama designates monument near Bundy ranch in Nevada"

http://www.kgw.com/news/obama-designates-monument-near-bundy-ranch-in-nevada/379940244

So much for exploitation of abstract principles, looks like the Bundy boys are now going to have to find new land to profit off of for free grazing