During a year of marked ideological divisions, the right to free expression has been challenged by everyone from the alt-right to the far left. For over 40 years, the National Coalition Against Censorship, an alliance of 56 national non-profits, has promoted freedom of thought, inquiry and expression through direct advocacy and education.

Source: http://ncac.org/blog/the-state-of-the-first-amendment-2017s-top-free-speech-offenders-and-defenders