With concerns mounting about the viability of his signature health-care law, President Obama on Thursday is planning to highlight some of the more popular aspects of the Affordable Care Act with remarks at the White House.

Obama is expected to focus on insurance company rebates that will be mailed to 8.5 million U.S. households this summer. The rebates, which average about $100 per family, are a result of a provision of the law that requires insurers to spend at least 80 percent of the premium dollars they collect on medical care, rather than executive salaries or marketing. Companies that fail to meet that standard must provide rebates to customers.