So you want him to get better so as that our people can politically humiliate him and send him packing out of Washington, the sheer humiliation and stress from how ugly and personal American elections can be these days might just as well end his life too.
Well, at any rate, I've got a new appreciation for you.
I want him to lose... but if he runs again in 2022 and wins, then that's what Arizonans want, and I'd respect that choice. They chose him in 2016, and I think they should be represented by the Senator of their choice for the full six years of the term for which they elected him.
And I think that, if you disagree with a politician, you should work to get that person out of office via the democratic process*. Death happens--but it's not something I'd wish on anyone.
EDIT: *And yes, that applies even to politicians I like. If you're in Vermont and think you'd make a better Senator for your state than Bernie Sanders, then run. If you're in Massachusetts and think you'd make a better Senator for your state than Elizabeth Warren, then run. I'd probably hope you lose at the ballot box, but I would never urge you not to run.
If I thought I'd make a better MP for my riding than my current MP, I'd run (or, rather, challenge him for his party's nomination, since I generally support his party)... except that I don't think I would.
EDIT #2:
On another issue, but contains a core principle with which I agree:
We should hold people who run for Senate to a higher standard. 6 years is a long time. Some people here arguing to take that away from the People and give it back to State houses. That's disturbing. If you trust them more then We The People, then you're probably a partisan minded individual.
I don't want decisions on who the people's representatives will be being made by anything or anyone other than the people, and that includes death.