It's kinda hard to explain but I found a reliable website
http://www.history.com/topics/mcculloch-v-maryland
Answer:
The answer is describes the legislative branch of the government :)
They both have an say in things like legislative branch can declare war but the government which is the executive branch has a say in it too
Abraham Lincoln had just signed the emancipation proclamation before he was shot which freed all of the slaves; However, the majority of the south still did not see the slaves as free and so they discriminated against them. Race relations were tight.
Solomon Northup was an outsider. He had grown up as a "free" black man. He had never experienced anything like that. He was accustomed to an entirely different existence.