Amicus Brief of Scholar Seth Barrett Tillman and the Judicial Education Project in Support of Petitioner, In re Donald J. Trump, in his official capacity, App. No. 18-2486 (4th Cir. Jan. 29, 2019) (filed by Josh Blackman et al.), ECF No. 28-1, 2019 WL 366219, 2018 U.S. 4th Cir. Briefs LEXIS 11.