Trump now owns Obamacare

President Trump seems gleeful every time the Affordable Care Act, aka Obamacare, encounters some new difficulty. But these are now becoming Trump’s problems, not his predecessor’s, and he’s likely to get most of the blame if some 20 million Americans who get health coverage under the ACA suffer from the program’s demise.

Health insurer Humana (HUM) recently said it would pull out of the ACA in 2018, a development Trump reveled in. Here’s the tweet:

Humana cited an “unbalanced risk pool” as its reason for withdrawing from the ACA, which is insurerspeak for too many sick people buying insurance and pushing up costs. This has been a problem for the ACA in general, which is one reason premiums under the program have shot up. Insurers initially underestimated the costs these new customers would impose, and set premiums too low. When ACA customers turned out to be sicker than expected, insurers had to compensate by raising premiums.

This in itself doesn’t mean Obamacare is failing. What it means is that insurers have to reprice their products in some markets to make sure they’re profitable. The bigger problem comes when insurers feel they can’t be profitable in certain markets, and simply leave. And that could eventually threaten the whole program.

The Kaiser Family Foundation reports that 21% of people who enrolled in the ACA in 2017 had only one insurer to choose from. That’s up from just 2% in 2016. The pullout of all but one insurer is arguably the threshold for “failure,” since the ACA relies on competition to keep prices down. When there’s just one provider, premiums soar.

These developments reflect inherent weaknesses in the design of the ACA. But they’re happening under President Trump, not President Obama. And further fractures in the ACA are possible, given that Trump and his fellow Republicans in Congress want to “repeal and replace” the entire law.

Humana is a small player in the ACA, with other insurers such as Aetna (AET), Cigna (CI) and Blue Cross/Blue Shield offering much broader coverage. So Humana’s departure won’t pull the whole house down. And bigger insurers might step in where Humana pulls out, perhaps because they have the scale to be profitable where smaller Humana doesn’t.