Summary

Robert H. Jackson Harisiades v. Shaughnessy & Mascitti…

The assumption is that the First Amendment allows Congress to make no distinction between advocating change in the existing order by lawful elective processes and advocating change by force and violence, that freedom for the one includes freedom for the other, and that when teaching of violence is denied so is freedom of speech.
Our Constitution sought to leave no excuse for violent attack on the status quo by providing a legal alternative-attack by ballot. To arm all men for orderly change, the Constitution put in their hands a right to influence the electorate by press, speech and assembly.
Source: Wikisource

Robert H. Jackson Harisiades v. Shaughnessy & Mascitti…

We are urged, because the policy inflicts severe and undoubted hardship on affected individuals, to find a restraint in the Due Process Clause. But the Due Process Clause does not shield the citizen from conscription and the consequent calamity of being separated from family, friends, home and business while he is transported to foreign lands to stem the tide of Communism. If Communist aggression creates such hardships for loyal citizens, it is hard to find justification for holding that the Constitution requires that its hardships must be spared the Communist alien.
Source: Wikisource

Robert H. Jackson Harisiades v. Shaughnessy & Mascitti…

But it does not require war to bring the power of deportation into existence or to authorize its exercise. Congressional apprehension of foreign or internal dangers short of war may lead to its use. So long as the alien elects to continue the ambiguity of his allegiance his domicile here is held by a precarious tenure.
That aliens remain vulnerable to expulsion after long residence is a practice that bristles with severities. But it is a weapon of defense and reprisal confirmed by international law as a power inherent in every sovereign state.
Source: Wikisource

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