America didn't vote to get rid of Republicans.
Just Trump
I know, but he ran on a Republican ticket with a Republican running mate, and was selected as a candidate by the Republican party.
There will be people voting Trump because they are Republican, not because they love Trump, as the alternative is a Democrat candidate and they don't want a Democrat agenda for America (either for economic reasons, social reasons or a mixture of both).
And anyway, my issue was with the claim that anyone who is good would automatically be on the opposite side to Trump.The approach of A is always right and B is always wrong isn't conducive to sensible debate.
But it isn't just a "someone", it's a teacher in a position of authority, an adult in a position of power and privilege in front of a classroom full of malleable minds, children who are still forming their own political opinions
And yet I think it was you who upthread said students know if a teacher is pushing a political agenda.
So sharing an opinion is political activism, students can tell when someone is pushing activism, but they also are so malleable that they are open to being brainwashed. 
I completely agree with you! I'm a university lecturer and we have to be really careful about what we say, otherwise it could mean disciplinary action. We are there to teach, not influence political opinions by abusing our power.
I agree, as do the teacher standards.
However there is a difference between using professional judgement to decide if and when to share (in line with the professional standards) and what some on this thread are claiming where any expression of a personal view is disgraceful, unprofessional and breaking the standards.