WASHINGTON — Americans are deeply skeptical about the current House Republican plan to replace the Affordable Care Act, and few think it will bring down costs or expand coverage, a new nationwide survey finds.

Nearly half the people say the GOP plan will increase the number of uninsured and raise prices for consumers who have to buy coverage on their own, according to the poll from the nonprofit Kaiser Family Foundation.

“What people really want out of their health care system is lower costs,” said Mollyann Brodie, who oversees polling for the foundation. “This is a warning sign that the public’s early impression of this is that it is more likely to raise costs.”

The poll — which follows release of the Republican legislation last week — may signal more challenges for the GOP, which is struggling to develop a replacement for the 2010 health care law, often called ObamaCare.

This week, an independent analysis by the Congressional Budget Office estimated the GOP legislation would double the number of Americans without health coverage over the next decade, increasing the ranks of the uninsured by 24 million.

At the same time, the budget office calculated health insurance would become increasingly difficult for lower-income and older Americans to afford.

The CBO report has further complicated Republican efforts to quickly pass the House legislation and send a bill to President Donald Trump.

Over the next decade, the House Republican plan would roll back nearly a $1 trillion in federal aid to states to provide health coverage to poor people through Medicaid.

The legislation also would loosen regulation of health insurers and restructure a system of insurance subsidies that currently help low- and moderate-income Americans who don’t get health benefits through an employer.