"The proposed Constitution, therefore, is, in strictness, neither a national nor a federal Constitution, but a composition of both" is a statement likely taken from the ___.

federalist papers

Explanation:

Federalist papers -

These are the collection of 85 articles and essays that are written by John Jay , James Madison  and Alexander Hamilton under the pen name of "Publius"  , which are required to promote the ratification of the United States Constitution .

The write ups are written in favour of the constitution of the United states .

Hence , from the question ,

The lines are taken from the federalist papers .

the answer is true!