Answer:
USA(republican and democrative) have 2 party system
Mostly there ignorance to research who they are voting for.
The reason for the change from isolationism to imperialism was because America was slowly becoming a superpower in the world during the 19th century. This was also due to the fact that America felt that it could maintain "peace" in the world through its power. To hold its status as a superpower, America had to take steps to establish itself around the world. The Imperial rule allowed it to compete with European states in terms of resources and money.
The white people started retaliating. The slaves were punished for little things, and the punishments were death or beatings. They also restricted slaves' activities, including their ability to assemble, grow their own food, earn any money, or learn to read. By creating fear in the slave population they enslaved them not only physically but mentally.
Hope this helps!