Here is a question about this article: Others, such as Rep. Roger Sherman of Connecticut, believed the clause was unnecessary because the original Constitution only gave Congress stated powers, which did not include establishing a national religion. Anti-Federalists such as Rep. Thomas Tucker of South Carolina moved to strike the establishment clause completely because it could preempt the religious clauses in the state constitutions. However, the Anti-Federalists were unsuccessful in persuading the House of Representatives to drop the clause from the first amendment.
What is the answer to this question: What power was not granted to Congress by the Constitution?
establishing a national religion