By overturning the “separate but equal” doctrine, the Court's decision in Brown v. Board of Education had set the legal precedent that would be used to overturn laws enforcing segregation in other public facilities

The main reason the us senate rejected the treaty of versailles was because, isolationists felt the us should not have gotten into the war. republicans had gained power in the senate. democrats had gained power in the senate. european nations wanted to punish germany.