Earl Warren,
Zemel v. Rusk — Opinion of the Court
“ It is important to bear in mind, in appraising this argument, that because of the changeable and explosive nature of contemporary international relations, and the fact that the Executive is immediately privy to information which cannot be swiftly presented to, evaluated by, and acted upon by the legislature, Congress-in giving the Executive authority over matters of foreign affairs-must of necessity paint with a brush broader than that it customarily wields in domestic areas. ”
