Let's look at Romneycare

Health care remains one of President Obama’s greatest political weaknesses. But the issue is an equally serious problem for Republican Mitt Romney. As governor of Massachusetts, Romney instituted an early variant of President Obama’s program, mandating the purchase of insurance. Romney continues to defend his system with desperate attempts to distinguish it from Obamacare. The best he can say is that his program was constitutional, since states, unlike Washington, possess the so-called “police power,” allowing them to regulate most anything.

Alas, even the former governor’s constitutional scruples are suspect. In 1994 he backed a federal mandate.