The Constitutional Opening: The Sebelius ruling on the Medicaid mandate gives states an important way out.

Paul Moreno at National Review: Observers believe Obamacare could not survive without the taxing-power-based “individual mandate.” However, it is also likely that it could not survive if a large number of states refused to go along with the Medicaid mandate. And opting out of the mandate is a constitutionally orthodox alternative to secession.