"So while impeachment or the 25th Amendment is a possibility, it's not a very likely one."
Just a historical note but 4 Presidents have had their terms terminated with extreme prejudice.
Only JFK was a Democrat. All the others were Republicans.
Although, unlike other world leaders the Prez has never had to worry about any of his own security popping a couple in his dome (spoiler alert. Except in "Airforce One" of course).
He'd have to really screw up for that to change.
Which I'm sure people find really reassuring.