Answer:
Northern states favored tariffs because they helped strengthen their industrial-based economy.
Oil shale
It was discovered in the region in the 1970s. it spurred economic growth in the neighboring areas of Colorado. however major a discovery it was, the industry declined leading to copper, silver and gold being the most important mineral resource in the Rockies mountain.
The colonies were founded by the United Kingdom. Most of the colonists had a positive attitude because of this. Many of their families lived in Britain at the time as well, but they also had come from Britain.
The doctrine that allowed people living in the territories to decide the issue of slavery through their governmental bodies was called popular sovereignty.