Which Constitutional principle illustrates that the Federal Government and State Governments divide power between them?

How are the freedom of religion and the freedom of assembly alike? both involve the freedom to express oneself. both were an original part of the constitution. both were practiced by the early puritans. both were denied to immigrants.

Which factor has played the most important role in changing the way history is studied over time?

If one thinks illegal immigrants should become american citizens, should they become american citizens automatically or should there be a waiting period?