D. Return of the republicans is your answer.
The best answer is, decreased dramatically.
Following the massive and consistent arrival of Europeans following the expeditions of Columbus in 1492, the American Indians were faced with devastation, disease, and death. Colonial settlers, the British, French, Spanish, and eventually American governments would all negotiate various treaties and agreements with the American Indians, however, these were often violated or negotiated in a way to leave the Indians in some kind of deficit. As the years passed and the tribes along the east coast were removed or assimilated, the American government enacted full-blown warfare against the American Indians in the mid-west and west, eventually forcing all remaining members into assimilation and reservations.
Settlers had to leave their homes and travel over mountains on foot with covered wagons.
They also faced the threat of Native Americans attacking them on their way.
Answer:
During the 1930s, the combination of the Great Depression and the memory of tragic losses in World War I contributed to pushing American public opinion and policy toward isolationism. Isolationists advocated non-involvement in European and Asian conflicts and non-entanglement in international politics. Although the United States took measures to avoid political and military conflicts across the oceans, it continued to expand economically and protect its interests in Latin America. The leaders of the isolationist movement drew upon history to bolster their position. In his Farewell Address, President George Washington had advocated non-involvement in European wars and politics. For much of the nineteenth century, the expanse of the Atlantic and Pacific Oceans had made it possible for the United States to enjoy a kind of “free security” and remain largely detached from Old World conflicts. During World War I, however, President Woodrow Wilson made a case for U.S. intervention in the conflict and a U.S. interest in maintaining a peaceful world order. Nevertheless, the American experience in that war served to bolster the arguments of isolationists; they argued that marginal U.S. interests in that conflict did not justify the number of U.S. casualties.