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

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Lincoln claimed that his inherent powers as President allowed him to take action to protect the country in a time of war or national crisis. He argued the blockade was necessary to prevent the Confederacy from gaining supplies and reinforcements from foreign countries through Southern ports. Congress later retroactively approved the blockade.

How Did Lincoln Defend His Decision to Order a Blockade