“O’Donnell ... suggested that Limbaugh’s audience is long in the tooth, claiming most of its members are on Medicare.”
Many old timers lose most of their private retirement insurance when they turn 65 and have to take an inferior medicare plan. I don’t think they would line up with O’Donnell.
By law you can not buy full health insurance after 65. You are forced to take Medicare. You can buy a suppliment (and AARP would love to have your money) or pay cash. They are you coming and going.