"The New Roof"

I found this interesting fact in a 1912 American history book...

The Constitution provided that when nine states had ratified, it should go into effect "between the states so ratifying." While it was under discussion the Federalists, as the friends of the Constitution were so named, began to refer to the Constitution as "the New Roof," which was going to cover the states and protect from political storms.

School History of the United States by John Bach McMaster