After the dred scott decision, frederick douglass said he sought to have americans live up to the principles of the constitution. what did he believe prevented americans from living up to the constitution?
manifest destiny abolition (my answer) popular sovereignty slavery

What policy did "jim crow" laws put in place? black codes integration segregation 2. the supreme court case that established the doctrine of "separate but equal" was dred scott v. sandford plessy v. ferguson brown v. board of education 3. the supreme court case that overturned the doctrine of "separate but equal" wasdred scott v. sandford plessy v. ferguson brown v. board of education