Support among Democrats jumped from 65 percent in January to 76 percent in the new poll. Independents (44 percent support; 54 percent oppose; and Republicans (20 percent support; 78 percent) was more stable, according to the poll. Surprisingly, the poll found a significant shift in support for the law among conservatives, with 36 percent of them backing it now compared to 17 percent in November.
On Republican efforts to replace Obamacare, Americans were also narrowly split: 47 percent support those efforts, and 49 percent oppose them.
The poll, conducted from March 26 to 30, surveyed 1,017 U.S. adults. The margin of error is 3.5 percentage points.