It will take time to build political support for healthcare reform, a top House Democratic advocate of President Obama's law said Wednesday.

Rep. Debbie Wasserman Schultz (Fla.), the Democrat in charge of promoting the new reform law, said on that law's one-year anniversary that voters are "reserving their judgment" on the measure.

"It is going to take some time to educate people about all the details and benefits," Wasserman Schultz said on a conference call organized by the Democratic National Committee (DNC).

"I think the polls show right now that the American people are reserving their judgment," she said later in the call.

The law turned a year old on Wednesday, and a variety of Republicans have promise to undo it.

A CNN/Opinion Research poll released Wednesday to mark the anniversary found that 37 percent of U.S. adults support the legislation, and 59 percent oppose it. Five percent expressed no opinion. Those numbers are roughly consistent with the bill's poll numbers a year ago.

Other polls have suggested that, at the same time, Americans don't favor repealing the legislation, as Republicans in Congress have repeatedly sought, and GOP presidential candidates have promised they'd do if they're elected in 2012.

"I don't really think you can go by the polls," Wasserman Schultz said. "They have been pretty steady. But if you poll the subset of people who have begun to benefit ... you would find that polling in those segments is higher than just the 50/50 for the American people."

The Florida Democrat defended the healthcare law's poll numbers by pointing to the fact that it wasn't doing worse, given the millions spent in opposition to it.

"If you ask me, the opponents of healthcare reform have really thrown a lot of money down a black hole," she said.