Logan Act.

1 Stat. 613, January 30, 1799, codified at 18 U.S.C. § 953 (2004): http://en.wikipedia.org/wiki/Logan_Act

The Logan Act. When in 1798 a Philadelphia Quaker named Logan went to Paris on his own to undertake a negotiation with the French Government with a view to averting war between France and the United States, his enterprise stimulated Congress to pass “An Act to Prevent Usurpation of Executive Functions,” ^[574] which, “more honored in the breach than the observance,” still survives on the statute books.^[575] The year following John Marshall, then a Member of the House of Representatives, defended President John Adams for delivering a fugitive from justice to Great Britain under the 27th article of the Jay Treaty, instead of leaving the business to the courts. He said: “The President is the sole organ of the nation in its external relations, and its sole representative with foreign nations. Of consequence, the demand of a foreign nation can only be made on him. He possesses the whole Executive power. He holds and directs the force of the nation. Of consequence, any act to be performed by the force of the nation is to be performed through him.” ^[576] Ninety–nine years later, a Senate Foreign Relations Committee took occasion to reiterate Marshall’s doctrine with elaboration.^[577]

^[574]18 U.S.C. § 953 (Private correspondence with foreign governments);

.^[575] See Memorandum on the History and Scope of the Law Prohibiting Correspondence with a Foreign Government, S. Doc. No. 696, 64th Congress, 2d Sess. (1917). The author was Mr. Charles Warren, then Assistant Attorney General. Further details concerning the observance of the “Logan Act” are given in E. Corwin, op. cit., n.44, 183–184, 430– 431.

^[576] 10 Annals of Congress 596, 613–614 (1800). Marshall’s statement is often cited, e.g., United States v. Curtiss–Wright Export Corp., 399 U.S. 304, 318, 319 (1936), as if he were claiming sole or inherent executive power in foreign relations, but Marshall carefully propounded the view that Congress could provide the rules underlying the President’s duty to extradite. When, in 1848, Congress did enact such a statute, the Court sustained it. Fong Yue Ting v. United States, 149 U.S. 698, 714 (1893).

^[577]S. Doc. No. 56, 54th Congress, 2d Sess. (1897).