My 5-year-old daughter has cystic fibrosis and may eventually need a lung transplant. Just before Christmas, the Trump administration gave an early gift to the roughly 113,000 Americans currently awaiting transplanted organs. It proposed two new rules that will make transplants easier.

The first proposal, from the Health Resources and Services Administration, would reduce costs for living kidney donors. The National Organ Transplant Act bans commerce in organs, and regulations even restrict the payment of expenses. While donors...