Americans younger than 30, a key group targeted by the Affordable Care Act, continue to be the least familiar with it. Another important group, those with lower incomes, are less familiar with the healthcare law than are those with higher incomes. …

Overall, familiarity with the healthcare law is up only slightly from late summer and October, with 72% now saying they are at least somewhat familiar with the law, while 28% say they are not. …

Those who are familiar with the healthcare law are significantly more likely to oppose it than those who are not familiar with it. Among those familiar with the law, net approval is -19 percentage points, slightly more negative than is the case for the overall population. Those who are unfamiliar with the law are evenly divided, with 41% approving and 43% disapproving.