At that time, the most controversial decision made by Andrew Jackson would most likely be his efforts to move the Native Americans from their land.
He was a prominent supporter of making legislation that enable American military to take the native american land by force.
If, other representatives at that time let Jackson getting his way in politics, Future presidents would most likely had to deal with the after effects of ethnic cleansing initiated by Jackson, and the racial tension in united states might be even worse that it is today.
The biggest motivation is to increase viewership while supporting a certain candidate and promoting him. Privately owned media sources are usually biased towards someone and help them while they show bad things about other candidates. In return, they expect support from the candidate if they ever get into a position of power. By being controversial, they get new viewers and earn more money.
A.were the first American music that was exported abroad
That depends on your social class. During the industrial revolution, the higher up in social classes the more beneficial it was. In the long run it was beneficial to our society because we learned a lot and gained a lot of knowledge, but many people suffered during it.