For the first time, the Washington Post-ABC News poll has found more Americans support Obamacare than oppose it.

The poll, released Monday, the law’s enrollment deadline, found 49 percent of Americans support the law and 48 percent oppose it. It was the first time, dating back to August 2009, that support outweighed opposition in the poll.

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.