Justice Sutherland speaking for the Court: It results that the investment of the Federal Government with the powers of external sovereignty did not depend upon the affirmative grants of the Constitution. The powers to declare and wage war. to conclude peace. to make treatiesAnd that is in particular what we are talking about hereto maintain diplomatic relations with other. sovereignties. if they had never. been mentioned in the Constitution. would have vested in the Federal Government as necessary concomitants of nationality. * * * The power to acquire territory by discovery and occupation (Jones v. U. S.. 137 U. S. 202. 212). the power to expel undesirable aliens (Fong Yue Ting v. U. S.. 149 U.
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undesirable aliens