It was a form of American foreign policy to further it's aims in Latin America and east Asia through use of its economic power by guaranteeing loans made to foreign countries
That they were done on slavery and that they believed in equal rights for all
Many of the racist white journalists claimed that he won only because he was black and was therefore possessing an animal-like instinct, which was unfair to the white competitor. They were extremely racist but it was accepted because it was the 30s, way before the civil rights era.
We cannot know the number unless you attach a picture of the map. However, the Bering Sea is a marginal sea in the Pacific Ocean that separates Alaska from Russian Siberia. Some scientists believe that during the last ice age, sea level was low enough to allow humans to cross from Russia to North America on foot, over what is known as the "Bering Land Bridge." They also believe that this was the first point of entry of humans into the Americas.