Letter Brief, from Seth Barrett Tillman and the Judicial Education Project as Amici Curiae in Support of the Defendant, Seeking an Order in regard to Plaintiffs’ Motion to Amend the Complaint, District of Columbia & State of Maryland v. Donald J. Trump, in his official capacity as President of the United States of America, Civ. A. No. 8:17-cv-01596-PJM (D. Md. Jan. 29, 2018) (Messitte, J.) (filed by Josh Blackman et al.), ECF No. 88, 2018 WL 1128948.