...even though the treaty was
self-executing, and thus part of the supreme Law of the land, its provisions failed to overcome a standing presumption against private rights of action: To determine whether a treaty creates a cause of action, we look to its text. S ee United States v. Alvarez-Machain , 504 U.S. 655, 663 (1992) (“In construing a treaty, as in construing a statute, we first look to its terms to determine its meaning.”). The Treaty of Amity, like other treaties of its kind, is
self-executing. See Medellín v....