Critics warn that Trump's demands for business leaders to step down, and for the government to take a cut of sales, threaten American-style capitalism.

In South Carolina, more than 150 unvaccinated schoolkids are under quarantine after being exposed to measles. Across the U.S., total case counts could be even higher than the official number.

Dr. Mehmet Oz, who heads the Centers for Medicare and Medicaid Services, is advancing a $50 billion plan to modernize rural health care.