Juan brings up an interesting point regarding State Nulification. No single state can nullify federal law within their own borders. I think we can all agree on that. But what happens with multiple states acting in concert? What happens if 30 states say no to Obamacare? What is the outcome of federal law, when the states from whom federal power is vested stand united against it? What is the threshold there? When does Article V implicitly come into effect rather than explicitly?