Demonstrators hold signs during a healthcare rally opposing the American Health Care Act (AHCA) bill on Capitol Hill in Washington, D.C., U.S., on Wednesday, June 21, 2017.

Americans consider the House Republican health-care bill to be a bad idea, by a 3-to-1 margin, according to a new NBC News/Wall Street Journal poll.

Just a third of Republicans consider the House-passed bill a good idea, the survey shows. The findings demonstrate the political headwinds facing President Donald Trump and his party as Senate Republicans attempt to assemble a majority to pass their version next week.

In the poll, conducted by telephone June 17-20, just 16 percent of Americans call the House-passed bill a good idea, while 48 percent call it a bad idea. Slightly more than one-third of Americans have no opinion.

Amid the GOP effort to repeal and replace Obamacare, public opinion on that existing law has turned narrowly positive. Some 41 percent call the law a good idea, compared with 38 percent who consider it a bad idea. Before Trump took office, views of the law were more negative than positive.

Asked whether the White House and Congress should continue the repeal-and-replace effort, 38 percent say yes and 39 percent no.

The survey of 900 American adults contains a margin for error of 3.27 percentage points.

The survey about the House bill was released on the day Senate Republicans unveiled their version of the effort to repeal and replace Obamacare.