Answer:
representative democracy AKA representative government but I think either one should work
They were worried about the punishment that the south was gunna get.
The southerners opposed that tariff
The Oregon Trail is the trail that extended from Independence, Mississippi, to the Columbia River in Oregon and covered 2000 miles of prairies, mountains and deserts. It is actually the east-west immigration and large wheel wagon route that connected the valleys in Oregon with the Missouri river. I hope the answer helps you.