Summary

Portrait of William Howard Taft William Howard Taft Mahler v. Eby — Opinion of the Court

It has established classes of persons who in its judgment constitute an eligible list for deportation, of whom the Secretary is directed to deport those he finds to be undesirable residents of this country. With the background of a declared policy of Congress to exclude aliens classified in great detail by their undesirable qualities in the Immigration Act of 1917, and in previous legislation of a similar character, we think the expression 'undesirable residents of the United States' is sufficiently definite to make the delegation quite within the power of Congress.
Source: Wikisource

Portrait of William Howard Taft William Howard Taft Mahler v. Eby — Opinion of the Court

Of course, the question how much additional evidence should be required must vary with the class which makes its members eligible for deportation. Alien enemies interned during war may be very good people, and their having been interned may have little bearing on their being good material for residents or citizens when peace returns; but the aliens in this case were convicted of crimes under such circumstances that the Secretary, without more, might find them undesirable as residents.
But the Secretary made no express finding so far as the warrant for deportation discloses.
Source: Wikisource

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