WASHINGTON — The White House is circulating a proposal that would extend subsidies to help consumers pay for coverage under the Affordable Care Act for two more years, as millions of Americans face spiking health care costs when the current tax credits are set to expire at the end of the year.

The draft plan suggests that President Donald Trump is open to extending a provision of Obamacare as his administration and congressional Republicans search for a broader policy solution to a fight that has long flummoxed the party. The White House stresses that no plan is final until Trump announces it.

The subsidies were at the heart of the Democrats’ demands in the government shutdown fight that ended earlier this month. Most Democratic lawmakers had insisted on a straight extension of the tax credits, which expire at the end of the year as a condition of keeping the government open.

Eligibility for the Obamacare subsidies, which were put in place during the COVID-19 pandemic to help people afford health care coverage, would be capped at 700% of the federal poverty level, according to two people with knowledge of the proposal.

The baseline tax credits that were originally part of the Affordable Care Act were capped at 400% of the federal poverty level, but that cut-off was suspended because of the temporary COVID-era credits that allowed middle- and higher-income people to benefit from subsidies too.

The White House would also require those on Obamacare, regardless of the type of coverage, to pay some sort of premium for their Obamacare plans. That would effectively end zero-premium plans for those with lower incomes, addressing a concern from Republicans that the program has enabled fraud. One option is a requirement that everyone pay 2% of their income, or at least $5 per month, for lower-tier plans.

Even as the White House’s proposal remains in flux, the notion of extending any part of President Barack Obama’s signature legislative achievement is likely to rankle conservatives who have sought to repeal and replace the law for well over a decade.

“Until President Trump makes an announcement himself, any reporting about the administration’s health care positions is mere speculation,” White House spokesman Kush Desai said Monday.

White House press secretary Karoline Leavitt told reporters on Monday afternoon that Trump “is very much involved in these talks” and that he is “focused on unveiling a health care proposal that will fix the system and will bring down costs for consumers.”

New Hampshire Sen. Maggie Hassan, one of eight members of the Senate Democratic caucus who voted to reopen the government earlier this month, said it “represents a starting point for serious negotiations.”

“The fact that President Trump is putting forward any offer at all to extend the Affordable Care Act’s tax credits shows that there is a broad understanding that inaction in this regard will cause serious harm to the American people,” Hassan said.