Answer:
The Supreme Court ruled on March 8, 1857 that crossing state borders into a "free state" did not entitle slaves to their freedom.
Explanation:
Dred Scott was a slave during that time period who was brought into a "free state" by the family that owned him. Dred Scott argued that since his was brought into that state it should therefore grant him his freedom. Unfortunately, the Supreme Court thought otherwise. They ruled that slaves were "property" and that property can be taken anywhere.
One reason is that because the slaves worked in the fields that there was natural resources to process on the northern factories
At least seven years:
“No Person shall be a Representative who shall not have attained to the age of twenty five Years, and been seven Years a Citizen of the United States, and who shall not, when elected, be an Inhabitant of that State in which he shall be chosen.”
Answer:
Because he was in search of a new route to India and thought he had found it while in fact the place he had discovered was America.