Over the coming weeks and months, you're going to hear a lot of Republican governors fulminate against the Affordable Care Act and swear to do everything possible to stand in its way—including refusing to participate in the Medicaid expansion. In fact, the governors of Florida, South Carolina and Louisiana have already promised to do exactly that. Ignore them. The deal the federal government is offering states on Medicaid is too good to refuse. And that’s particularly true for the red states. If Mitt Romney loses the election and Republicans lose their chance to repeal the Affordable Care Act, they’re going to end up participating in the law. They can’t afford not to.