The insurers, some which have already started leaving the marketplaces because they are losing money, say they need a clear commitment from the Trump administration and congressional leaders that the government will continue offsetting some costs for low-income people. They also want to keep in place rules that encourage young and healthy people to sign up, which the insurers say are crucial to a stable market for individual buyers.
The demands are a sort of warning shot to Republicans. While the party is eager to repeal the law as quickly as possible, and many have promised a replacement, its members are sharply divided over what shape any new plan should take. If they do not come up with an alternative, more than 22 million people would be left uninsured, including the more than 10 million who have bought individual plans on state marketplaces.