Health insurers across the country are making plans to dramatically raise Obamacare premiums or exit marketplaces amid growing exasperation with the Trump administration’s erratic management of the program and its conflicting signals about the fate of aid for low-income consumers and other key issues.

At the same time, state insurance regulators — both Democrat and Republican — have increasingly concluded they cannot count on the Trump administration to help them ensure that consumers will have access to a health plan next year.