All politics aside. I will say that the AARP membership with its "discounts and other perks" is useless except for the supplemental health insurance. When I was about to turn 65, I asked the person in charge of billing at my PCP office which supplemental was the easiest for her to work with and took the best care of their patients. She said United Health Care through AARP. I also talked with a friend who is two days younger than me who took care of the health insurance for a major non profit we worked for before retiring. She said she was going with AARP.
Medicare is Medicare. United Health Care has taken excellent of me and the wife. If Medicare covers it, United/AARP takes care of the remainder. The wife recently had back surgery. The charges for the hospital and surgeon were over $36K. Not that they got that much, but the total she paid including rehab was ZERO. Had my knee scoped in November, same out of pocket. Yes, it is about $200 a month a piece plus the Medicare premium, but that is a heck of a lot less than we were having to pay for our employer provided health insurance.
We also picked the AARP supplement because of its portability out of state.