Fourth, also relevant to the issues discussed in the Roberts statement is how Congresses and successor presidents have treated presidential actions taken pursuant to the Act. Here, too, the record is clear. Many presidents have expanded national monuments established by their predecessors. None have abolished earlier monuments outright, and actions like President Trump’s shrinking of established monuments are exceedingly rare, and unheard of in recent decades. Similarly, Congress has many times legislated to confirm and expand presidentially established national monuments.
Moreover, Congress has refused almost all suggestions that it restrict the scope of the Act. Only in a handful of cases—almost all involving small, obscure areas of public lands—has Congress withdrawn protections presidents have established through the Act, and only twice has it ever limited the president’s power to use the Act in particular jurisdictions. See generally, Mark Squillace, The Monumental Legacy of the Antiquities Act of 1906, 37 Georgia L. Rev. 473 (2003); John Ruple, The Trump Administration and Lessons Not Learned from Prior National Monument Modifications, 43 Harv. Envtl. L. Rev. 1 (2019).
Of course, should President Biden decide to follow the lead of his many predecessors who have made vigorous use of the Antiquities Act to protect worthy areas of public lands, he should take care to ensure that his actions fit within its terms. This means, first, identifying with some precision those features of “historic or scientific interest” that deserve the protection of the Act, and second, explaining why the lands being included in new national monuments are the “smallest area compatible with the proper care and management of the objects to be protected.”
Should President Biden’s team do their jobs, I am confident that, if asked, the courts would uphold his actions. Indeed, it would be astounding were the courts to ignore the lengthy and unbroken history of judicial deference to presidential actions under the Antiquities Act, and instead be guided by implications they might choose to read into the Chief Justice’s superficial remarks. Put another way, the Biden Administration would be foolish to allow the Roberts statement to deter it from making vigorous use of one of the most consequential statutes in the long history of public lands, the Antiquities Act of 1906.