From all indications, the second enrollment for Obamacare is going smoothly for Connecticut residents. But then, Connecticut residents had a relatively easy time the first go-round, even while the federal exchange’s website crashed beneath the weight of would-be applicants. If enrollment is easier all around this time, the law itself faces some of its toughest challenges. The Supreme Court will hear a case that will examine the legality of important federal subsides that help low- and middle-income Americans pay for policies in states that haven’t set up their own exchanges. At issue is the law’s language that refers to subsidies being paid in exchanges “established by the state.” Roughly 4 million people receive those subsidies.