At the outset of the Civil War, President Lincoln called up state militias, blockaded southern ports, expanded the army and the navy, spent $2 million from the U.S. Treasury, “closed the Post Office, and . . . suspended the writ of habeas corpus in certain localities, [and] caused the arrest and detention of persons who were ‘represented to him as being engaged in treasonable practices.’” Of these, which was the only one that was within his constitutional authority as president?
calling up the state militias
blockading the southern ports
closing the post office
suspending habeas corpus
