While all the current Republican governors have criticized President Barack Obama’s health care policy, and nearly all have joined the Florida lawsuit that may strike down the law, it appears most of these same governors are planning to proceed with their chief responsibility under the law: setting up state-level regulated health insurance markets, called “exchanges.”

No Republican governor has been a greater fan of exchanges over the past few years than the most politically powerful of them all—Mississippi’s Haley Barbour, who is now openly considering a run for Obama’s job in 2012. Even before the president and his allies forced their ill-advised insurance overhaul through Congress, Barbour had endorsed the exchange concept for Mississippi and three times unsuccessfully supported state legislation to that effect. And in a Heartland Institute survey of all Republican governors conducted last month to find out how many of them would support a sunset provision—which would dissolve the exchanges should Obamacare be repealed or struck down by the Supreme Court—only Barbour rejected the concept.