The problem was that the colonists were trying to take away a land which belonged to another people. Some native americans were able to let them go and enable them to live in peace where they chose, other native americans decided they would opt for the more harmful choice.
Colonists were having problems with Native Americans because Colonist came right in not really asking to be on the land and making towns and villages. There was a language difference which caused difficulty trying to communicate between colonists and Native Americans. And Colonist went around killing and also brought diseases along with them. Which were killing Native Americans. But Colonists were also killing Natives with their bare hands.
Farmers formed cooperatives, interest groups, and political parties to protest their declining fortunes and to increase their political and economic power.
I think he was a very successful president. FDR had many accomplishments, but his most important one was the New Deal. The New Deal helped people recover from The Great Depression by getting them jobs.