The power of teacher’s unions varies a ton. Supposedly in some places they have so much power it’s impossible to fire teachers for pretty much any reason. I’ve never seen anything close to that, but I believe accounts that such districts exist. Meanwhile in others the best they can do, with great effort, is get districts to pinkie-promise not to abuse teachers (but then do it anyway, of course). That’s the only kind I’ve seen but I dunno how it works in New York or Chicago or wherever.
