Republicans, farmers and other debtors is the right answer.
Republican Congress during the time of Civil War enacted high tariffs to defend the industries of the nation and to collect the fund for the Union ministry. The tariffs also generated other countries to counter by placing taxes of their own on the farm products of the United States. This resulted in the loose of share in the overseas market for the farmers.
The historical and present day significance of the declaration of independence is that it defines our rights. It ensures our independence so that we do not fall back into the monarchy of the times when we were ruled by a king.