Noah Feldman: The new case against Obamacare is serious

Could key portions of the Affordable Care Act be declared unconstitutional — years after the Supreme Court upheld them? The Trump administration’s Department of Justice has just filed a brief saying so in a suit by several states that aims to take down the whole program.Most mainstream legal commentators think the government’s arguments are unconvincing. But it’s crucial to remember that this was exactly the reaction of the same set of people in 2010, when the original ar