Final answer:
The quotation expressing an opinion of a Federalist is by James Madison, who believed in a strong and centralized national government for uniformity.
Step-by-step explanation:
The quotation that expresses an opinion of a Federalist is: "I would propose... that... the national Government should [possess] positive and complete authority in all cases which require uniformity." - James Madison
James Madison, one of the authors of the Federalist Papers, believed that the national government needed to have strong and centralized power in order to ensure uniformity in various matters such as trade regulation, taxation, and naturalization. This aligns with the Federalists' view of a strong centralized government that would prevent tyranny and preserve the rights and interests of citizens.