For those interested in the medical side of this, full strength chemo absolutely ca be fatal to an elderly person. If teh cancer spreads or worsens and they have to use strong chemo that could be it for him.
OTOH, my grandfather had a lymphoma many years. They treated him with mild chemo due to his age and he lived to age 89.
So it all depends.
Aside from this illness, he is an awful senator and it seems he is hated by everyone including his fellow senators.
The older that you get, the more likely it is that you will eventually get some form of cancer. The good news is that it will generally grow much slower in an older person than it would in a younger person.
But chemo is poison — a poison directed at the cancer— but it also affects the rest of you. Older people can’t take high dose chemo, but high dose chemo is rarely as necessary for older people as it would be for younger people whose cancer is often much more aggressive and fast moving.