How do you even have a jury trial for a president? isnt the jury supposed to not have a preexisting opinion of the person being charged?

Sadly true. However given jury selection is a thing, you can bet that prosecution did their best to weed out any overly biased jurors.

I mean, nothing is perfect (it's humans all the way down, and humans are flawed), but for a trial like this you can bet both sides went over everyone with the biggest magnifying glass they could find.

One of the cases in NY his lawyers failed to request a jury trial, and is being adjudicated by the judge who clearly has no love for the defendant, and seems to be doing everything he can to avoid an appeal, much less a mistrial. That one is sticking .

That’s true, but in every case against him with a jury so far, he’s still lost, even though a few jurors were trump supporters. When presented with the evidence in a forum where they have to listen, where that evidence wasn’t filtered through their lunatic talking heads, and where they couldn’t immediately run to their extremist forums to filter and reinterpret it for them, they’ve realised that oh yeah, this guy is a criminal and they’ve been duped.

I’m not concerned about rogue jurors. Many of his supporters can come back to reality when that reality is no longer filtered through a bullshit lens. Watch The Brainwashing of My Dad on ~~Netflix~~ (e: it’s no longer on Netflix. So Freevee, Prime, or Apple TV, I guess. I added the IMdB link, which includes places to watch it now). It covers much of that effect.

At his age and health, only a couple of years would effectively be a death sentence.

Having to live in a cell without his luxuries, entourage, and Diet Coke button would break him pretty quickly. He’d likely have a heart attack from the stress and indignation far before even a short sentence was over.

I'm still holding out for first presidential candidate to croak weeks from election day

Actually they could throw him in a maximum security prison and condem him to solitary confinement (for his own protection you know) and that would negate the need for the Secret Service

"Yeah, he's a convicted felon, but we can't put him in jail because that would inconvenience the Secret Service."

Nope. Sorry it's a burden for them, but they can figure it out. Make a prison out of the brig on an abandoned military base in the middle of nowhere with him as the only prisoner. It worked for Rudolph Hess.

Prison is for poor people, not presidents. I think most people understand that not everyone is equal under the law at this point in time.

In a sane world, an incompetency plea would bar someone from office

That's not how incompetency pleas work.