If the original intent is for a clause to have a restrictive meaning, then it likely has a restrictive meaning. If its original intent is to have an expansive meaning, then it likely has an expansive meaning.
Generally speaking, the original intent of the Bill of Rights is to have a relatively expansive meaning (the 9th amendment helps make this clear), and the original intent of the powers granted to the federal government is to have a relatively restricted meaning (as Madison said, "few and defined") (also, see the 10th amendment).
Oh, they may indeed be "few and defined", but I don't see how it makes each one restrictive. "To regulate commerce" is very expansive. "Regulate" has been expanded, "commerce" has been expanded -- hell, the definition to include navigation as commerce was added when the ink was still wet on the constitution.