Due to the colonist and such leaving from a tyrant ruled nation. They wanted to make sure the same wouldn't happen over here, therefor they gave the President power. However it would go through some people and such. For example President Trump signed a bill, the travel ban. Yet in around 1 to 2 days, the Judicial Branch found it unconstitutional. Therefor it was overturned and disbanded.
By moving into these countries and establishing trading posts, they were then able to establish a military presence.
B I think? They both had great militarily
It was a compromise made in 1820 between the Free States and the Slave States. The country admitted two new states into the union, Maine and Missouri. Maine would be a free state while Missouri would be a slave state, thus maintaining the balance between these two factions.