News that CVS Health's Aetna is pulling out of the individual health insurance business, also known as Obamacare, could mean more insurers will follow if President Trump and his fellow Republicans in Congress cut health benefits. CVS' decision leaves about 1 million people in 17 states looking for new coverage in 2026. That's a fraction of the more than 24 million Americans who signed up for such coverage on the ACA exchanges last fall. But Republicans and the Trump White House are making moves to make it difficult on health insurers to sell Obamacare.