He is now a patron saint of the Democrat Party.
I've not heard of any Democrat party members or supporters saying the John McCain is a patron saint.
I'm pretty sure most would disagree with his politics.
People do mention that Trump criticised him for being a prisoner of war, meanwhile Trump paid a Dr to say he has bone spurs.
This is a very valid thing for people to bring up when others try to make claims that Trump is brave and a hero for being shot at in assassination attempts.
There are two main things that I remember about McCain.
1. That time when he was campaining for president and a woman in his audience was calling Obama a Muslim and a terrorist, and McCain gently told the lady that Obama is a good man, but just they they have policy differences.
This to me gives the impression that McCain is an honorable man, not resorting to smears or baseless attacks, but wanting to campaign on policy differences.
2. That time that McCain voted against the repeal of the ACA.
I mean, it's fair enough to do a replace if you have a good healthcare plan that you believe is better. But just simply to repeal, just sounds like spite to me. McCain probably saved the lives of many poor people that day.
But other than that, I don't know much about the guy, don't know what his policies were, don't know what other things he voted for or against (I just assume he was a conservative Republican and as such probably voted that way. I'm not from USA and don't generally pay attention to all her politics.