What happens if the Supreme Court overturns the Patient Protection and Affordable Care Act? In some ways, very little: The architects of the constitutional case against the law designed their argument as a precision-guided missile that would take out ObamaCare while leaving the surrounding legal and policy edifice standing. Politically, however, writes Senior Editor Peter Suderman, a ruling against ObamaCare could have a huge effect. Would health policy simply return to its pre-2010 state? Yes, but with one major difference: ObamaCare would be discredited, legally and politically—potentially clearing a path to more effective health care reforms.