On the far opposite end of the unpopular viewpoint scale, I started a (satirical) Satanist Club at my southern highschool
The topic:
https://forum.blockland.us/index.php?topic=292192.0I would first complain directly to the teacher, and ask why he took it down. Maybe he has a genuine reason, like "We can't have posters in this area because we are planning to paint over it". He probably wont. Tell him that it is discrimination, and if he proceeds, have your parents send a scary email or call to the school. My extended family is all lawyers so I could probably get some legal advice if you want it.
The excuse the school will probably try to use is that "It's a distraction," to which you need to remove all blame from yourself. Tell them firmly that you haven't done anything wrong, and that it is the responsibility of every student to keep themselves focused during school, and there are many things more distracting than a poster. They'll probably tell you that they will have a staff meeting to discuss what you've said, and hope it will go away if you wait long enough. Ask them when exactly the meeting will be and if it could be soon, as you feel there is serious discrimination at the school.
If they do the above tactic of trying to avoid conversation with you and hoping it will go away, I recommend writing to one of many student's right organization around the US and having them directly contact your school.
Best case scenario, they let you keep up the poster.
Worst case scenario, they ignore you and violate your rights. (I could get a legal letter for you to send them if this is the case)
Most probable scenario, they take down all of the posters to avoid putting up yours.
I've been putting up with this garbage for the last 4 months so if you want any other advice, feel free to ask.
that's irrelevant. the first amendment doesn't give you the right to hang posters on other people's property. I do think it's stupid for them to allow posters for some candidates and not others, but you wouldn't have any luck in an actual court setting. that's not to say threatening to sue won't get anything done, but what you should really do is protest it. get your friends and some other students who agree together and figure out a way to protest it. moltenkitten's solution is stupid and will probably not work
This is a violation of the 1st Amendment. It's selective discrimination, saying that "We'll allow X candidates on postes, but not Y candidates." Banning political posters altogether would not be a violation as students do not have full constitutional protection, for the purposes of a distraction-free educational environment.
Now, why they let students hang up posters to begin with, is a mystery.