The Trump administration took another major swipe at the Affordable Care Act (ACA), halting billions of dollars in annual payments required under the law to even out the cost to insurers whose customers need expensive medical services. In a rare Saturday afternoon announcement, the Centers for Medicare and Medicaid Services said it will stop collecting and paying out money under the ACA’s "risk adjustment" program, drawing swift protest from the health insurance industry. (Amy Goldstein, Washington Post)