Cite as: 591 U. S. ____ (2020) 3 Syllabus And state election laws evolved to reinforce that development, ensuring that a State’s electors would vote the same way as its citizens. Washington’s law is only another in the same vein. It reflects a longstanding tradition in which electors are not free agents; they are to vote for the candidate whom the State’s voters have chosen. Pp. 13– 17. 193 Wash. 2d 380, 441 P. 3d 807, affirmed. KAGAN, J., delivered the opinion of the Court, in which ROBERTS, C. J., and GINSBURG, BREYER, ALITO, SOTOMAYOR, GORSUCH, and KAVANAUGH, JJ., joined. THOMAS, J., filed an opinion concurring in the judgment, in which GORSUCH, J., joined as to Part II.