The Prize Cases (1862) –held Prez Lincoln could blockage Southern ports
following the Confederate attack on Fort Sumer. Reasoning that the Prez could
resist an attack by a foreign nation; the fact that the attack came from an
internal part of the Union rather than from a foreign power did not strip the Prez
of his power to take unilateral action. Congress was not in session & it was a
‘sudden attack’ on American soil-Exec. is responsible protection of the national interests