As long as I'm discussing physical abilities today, I might as well offer my 2 cents worth on presidential health.
There's a current controversy over the release of medical records. I quickly agreed with Kevin Drum's post on medical and financial transparency. Latter Twitter provided more information--Bloomberg is a qualified pilot, including helicopters, and passed an FAA medical exam last year; there's not that much difference among the types of medical information provided by current and past candidates--typically a physician's summary with some data but not really complete information.That includes Sanders.
Apparently Bloomberg had two stents inserted in the past, but not as aftermath to a heart attack. Biden has survived brain surgery, which sounds scary but apparently doesn't have any meaning for the future.