Congress had decided that once a slave traveled into a free state, they were free and they could never be enslaved again. But in the Dred Scott decision, they changed their mind and people no longer had to honor "once free, always free."
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Explanation:
The passive voice is a verbal construction in some languages for which is presented to the subject as passive, while action taken by the verb is performed by a complement and not by the subject agent the verb in active voice.
The statement in Martin Luther King Jr.'s "I Have a Dream Speech" is trying to point out South's racial problems. But the sad part is that it is ignored racial injustice that you can find in the North is not true. Nevertheless, the whole speech is focused more on the South's injustices that is also recognized in the South.
