List four free states west of mississippi river

Which statement describes a similarity between the great migration and to this day

Why did some states believe they had the power to overturn federal laws?

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