With the Supreme Court’s ruling that the federal government can continue to provide health insurance subsidies, the Affordable Care Act, as President Obama said in reaction to the ruling, “is here to stay.” Five Washington insiders, including Democrats who drafted the bill and guided it into law, and a Republican who urged state governors to set up insurance exchanges, will talk about how we reached this moment. How did the law pass and survive in the face of fierce opposition? How will it evolve in the coming years? What legal, financial and political challenges lie ahead?