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Slave laws were later passed in several of the 13 original colonies, and there were rules governing slaves who had fled to America as early as 1643 and the New England Confederation. A legislation was enacted in New York in 1705 to stop runaways from escaping to Canada, while laws were prepared in Virginia and Maryland offering rewards for the capture and return of escaped slaves. Many Northern states, including Vermont, New Hampshire, Rhode Island, Massachusetts, and Connecticut had abolished slavery by the time of the Constitutional Convention in 1787. Southern politicians noticed that the Constitution had a "Fugitive Slave Clause" because they were worried that these newly established free states would turn into havens for fugitives.

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It was in the free states.

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Congress changed the Fugitive Slave Act in 1850 as a result of rising pressure from Southern leaders. This new rule, which was a component of Henry Clay's famed Compromise of 1850 a collection of laws that assisted in quelling early aspirations for Southern secession forced residents to aid in the capture of runaways.

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Democratic Senator James M. Mason of Virginia wanted it.

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The Fugitive Slave Act of 1850, passed by Congress on September 18, 1850, was a component of the Compromise of 1850. Even if a slave was in a free state, the statute mandated that they be returned to their masters. Additionally, the act gave the federal government control over tracking down, bringing back, and prosecuting fugitive slaves.

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So the north could give the south something they were happy about