How did lincoln defend his decision to order a blockade of southern ports without the approval of congress?

How did Lincoln defend his decision to order a blockade of southern ports without the approval of Congress?

Explanation:

By 1861 when President Lincoln was first inaugurated, certain issues erupted involving the seven slave states from the southern region that moved away from the federal union to form confederate states of America. In order to prevent the issue from escalating and involve other slave states, Lincoln quickly used his presidential powers without approvals from the congress to expand the Federal military service that eventually blocked the confederate ports.

The president later explained that he did not seek approvals from the congress because they were on recess at the time the issue erupted. He further asked the congress to accept his actions during such unplanned national emergency.  

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