This week Republicans in Congress began their effort to repeal and potentially replace the Affordable Care Act. But after listening to working-class supporters of Donald J. Trump — people who are enrolled in the very health care marketplaces created by the law — one comes away feeling that the Washington debate is sadly disconnected from the concerns of working people.

Those voters have been disappointed by Obamacare, but they could be even more disappointed by Republican alternatives to replace it. They have no strong ideological views about repealing and replacing the Affordable Care Act, or future directions for health policy. What they want are pragmatic solutions to their insurance problems. The very last thing they want is higher out-of-pocket costs.

The Kaiser Foundation organized six focus groups in the Rust Belt areas — three with Trump voters who are enrolled in the Affordable Care Act marketplaces, and three with Trump voters receiving Medicaid. The sessions, with eight to 10 men and women each, were held in late December in Columbus, Ohio, Grand Rapids, Mich., and New Cumberland, Pa. Though the participants did not agree on everything, they expressed remarkably similar opinions on many health care questions. They were not, by and large, angry about their health care; they were simply afraid they will be unable to afford coverage for themselves and their families. They trusted Mr. Trump to do the right thing but were quick to say that they didn’t really know what he would do, and were worried about what would come next.

They spoke anxiously about rising premiums, deductibles, copays and drug costs. They were especially upset by surprise bills for services they believed were covered. They said their coverage was hopelessly complex. Those with marketplace insurance — for which they were eligible for subsidies — saw Medicaid as a much better deal than their insurance and were resentful that people with incomes lower than theirs could get it. They expressed animosity for drug and insurance companies, and sounded as much like Bernie Sanders supporters as Trump voters. One man in Pennsylvania with Type 1 diabetes reported making frequent trips to Eastern Europe to purchase insulin at one-tenth the cost he paid here.