WASHINGTON — Message to President Donald Trump and congressional Republicans: Stop trying to scuttle the Obama health care law, and start trying to make it more effective.

That’s the resounding word from a national poll released Friday by the nonpartisan Kaiser Family Foundation.

The survey was taken following last month’s Senate derailment of the GOP drive to supplant much of the Affordable Care Act with a diminished federal role in health care.

Around 4 in 5 want the Trump administration to take actions that help the law function properly, rather than trying to undermine it. The Trump administration has discussed moves like curbing outreach programs that persuade people to buy coverage and not enforcing the tax penalty the statute imposes on those who remain uninsured.

Just 3 in 10 want Trump and Republicans to continue their drive to repeal and replace the statute. Most prefer that they move to shore up the law’s marketplaces, which are seeing rising premiums and in some areas few insurers willing to sell policies.

In the survey, 6 in 10 say Trump and congressional Republicans are responsible for any upcoming health care problems since they control government.

By nearly 2-to-1, most say it’s good that the Senate rejected the GOP repeal-and-replace bill last month.

The Kaiser Health Tracking Poll Aug. 1-6 involved random calls to the cellphones and landlines of 1,211 adults. The margin of error is plus or minus 3 percentage points.