What exactly do you mean by "government of limited powers"? I cited Marbury because the Supreme Court gave itself the power of judicial review which is not specifically enumerated in the Constitution. All three branches of government have been "finding" things in the USC since day one.
Ah. You're just talking about the fact that, over time, we've expanded the scope of each of the enumerated powers to cover more stuff.
I agree with you, but the fact that SCOTUS has liberally construed many of the enumerated powers doesn't change the fact that the powers ARE enumerated and that, if you can't fit it under one of the existing powers, you don't get it.
I don't see any caselaw that would support stretching the Foreign Commerce Clause nearly as far out of shape as joobz is trying to, and in the absence of such caselaw, the default position (no power exists) is maintained.
ETA: I'll also note that right now federal powers are in something of a decline, since the Rehnquist court repeatedly struck down laws as exceeding Congress's authority and there's no indication that the Roberts court will change this trend.
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