Oh yes it is constitutional

Cliven 'Ted' Bundy

"The Congress shall have power to dispose of and make all needful Rules and Regulations respecting the Territory or other Property belonging to the United States; and nothing in this Constitution shall be so construed as to Prejudice any Claims of the United States, or of any particular State."


If assholes are going to refer to the Constitution they should try reading it first. Squatters are scumbags and if after 20 years of refusing to leave, they should be treated just like some urban squatter. You don't get special privileges just because you're an America-hating nutjob. Get those scumbags off my land. By any means necessary.

h/t - Think Progress.