A plan the Clinton campaign unveiled in September would create a refundable tax credit worth as much as $2,500 per individual and $5,000 per family to cover out-of-pocket health-care expenses. Knowing there is a federal credit might give employees incentive to incur additional expenses to exceed the subsidy threshold. That would mean a credit aimed at mitigating the effects of rising health costs for some families could end up exacerbating the problem on a broader scale.
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