The correct answer is Federalists.
After the passing of the US Constitution at the Constitutional Convention, conflict continued between Federalists and Anti-Federalists. Federalists, on one hand, wanted a loose interpretation of the Constitution. This means that just because a power is not specifically given to the federal government, it does not limit the federal government from taking that action. A perfect example of this would be the Louisiana Purchase.
However, Anti-Federalists felt that a loose interpretation of the US Constitution would give the federal government too much power. This is why Anti-Federalists were in favor of a strict interpretation of the US Constitution.