Without the tax credits, people will lose coverage, putting their health and finances at risk, experts say.

Most of Donald Trump’s supporters back keeping enhanced subsidies for Affordable Care Act plans, the central obstacle in ending the government shutdown, according to a new poll from the nonpartisan health policy research group KFF. It was conducted Sept. 23 through Sept. 29, just days before Congress failed to pass a funding measure to keep the government open.

More than 22 million people receive the subsidies, which are set to expire at the end of the year unless Congress extends them. Losing the subsidies could mean that average out-of-pocket premium payments could double in 2026, from $888 a year to $1,904, an earlier KFF analysis  found.

Around 4 million people are projected to go without coverage next year because they can no longer afford it, according to the Congressional Budget Office. Extending them would cost the federal government around $350 billion over the next decade.