"It is well past time that the United States joins the rest of the industrialized world and treats healthcare as a right, not a privilege, by improving traditional Medicare and expanding it to everyone."

Humana said it is exiting plans covering roughly 600,000 seniors to "drive the intended margin expansion."

"It is well past time that the United States joins the rest of the industrialized world and treats healthcare as a right, not a privilege, by improving traditional Medicare and…