Why did some southern states begin to talk of seccession?

Based on this graph, it is reasonable to assume that by 1930 the percentage of the population with the right to vote was

During world war 11 how did the policy of internment affect people of japanese descent in the united states

Why didn’t the united states participate in the league of nations? the u.s. senate did not want the country to join. president wilson did not want the country to join. the league of nations was only for european countries. the league of nations had failed to prevent world war 1