He did not look dead or dying in February.
https://www.azcentral.com/story/news/politics/arizona/2018/03/13/meghan-mccain-still-no-timetable-ailing-father-john-mccains-return-senate/422908002/
I’m not arguing with you, I’m asking rhetorically...
If he’s so healthy, and he can attend events in AZ, then why isn’t he doing the job he’s being paid for in DC?