Shifting the U.S. health care system to a single-payer plan is one of the top issues in the 2020 Democratic presidential primary, but candidates are divided.
PHILADELPHIA (AP) — A 10-year-old girl ailing with cystic fibrosis is recovering from a transplant of adult lungs made available to her by a judge's controversial ruling that expanded her options for lifesaving surgery. Sharon Ruddock says her niece, Sarah Murnaghan (MUR'-nuh-han), un…