Montana Constitution, Article II
Section 7. Freedom of speech, expression, and press. No law shall be passed impairing the freedom of speech or expression. Every person shall be free to speak or publish whatever he will on any subject, being responsible for all abuse of that liberty. In all suits and prosecutions for libel or slander the truth thereof may be given in evidence; and the jury, under the direction of the court, shall determine the law and the facts. 