It was very important because it established two things. First is that the Constitution grants to Congress implied powers for implementing the Constitution's express powers, and the second is that state action may not impede valid constitutional exercises of power by the Federal government
The President was Harry Truman
Disagreement and resentments is the answer :)
I am not sure if this is correct, but I really think it is: I believe that Aristotle thought that punishement like in our time jail, and in theirs, torture, that democratic ideas came from this punishment. They were in a different time, and also this may have inspired our laws today! Anyway, if this is wrong, please take it down because I would not like for someone else to make an error if this answer is incorrect. Thank you! Have a great day :)
Again for a reminder, please take this answer down or rate it as incorrect if this is wrong. Good luck :)
It was the most used trail to get to the West.