The constitution is often thought of as a document that was unanomously supported by the Americans but the document was barely ratified in most state legislatures by three or four votes. Not even all states signed onto it initially. The biggest blow to the idea that the constitution was wholly popular was the fact that many of the most prominent founders of the revolution such as Thomas Jefferson did not show up to the constitutional convention itself so this change was not supported by all the founders of this country. The only way the constitution could get over this massive hump was to throw in the bill of rights which was nothing more than re-affirming ideas already states about how the government should run and have the creators of the document run around and write the federalist papers in order to get people to vote for it. If you were to run a popularity poll on its approval it probably would have got George W. Bush's numbers like 50.0000001% of the vote which shows how contentious this new constitution was at the time.