I am not legal expert but it makes perfect sense that any government official must not deny access to information to any citizen which is easily available to another. Blocking means other person can not see trump's tweets. I believe Trump can always mute other people. Let us consider the following scenarios : - Trump blocks only black people on Twitter. - Hawaii's missile alert systems issues a real missile alert on…
So, in the President's case, if someone is retweeting him and criticizing his words, or calling him out by his Twitter handle in a way that he doesn't like, he can block them and literally prevent them from posting certain content about him.
This is mindbogglingly unethical.