While not an amendment, there certainly have been provisions to compel entities from providing a forum for sides they don't want to promote. [0] See also the no

While not an amendment, there certainly have been provisions to compel entities from providing a forum for sides they don't want to promote. [0] See also the now-repealed fairness doctrine. [1] [0]: https://en.wikipedia.org/wiki/Equal-time_rule https://en.wikipedia.org/wiki/Equal-time_rule [1]: https://en.wikipedia.org/wiki/FCC_fairness_doctrine https://en.wikipedia.org/wiki/FCC_fairness_doctrine