You would need to be careful exactly what the printed materials said.
If they advised people to vote for representatives sympathetic to the “cause” (whatever that might be), then you should be OK.
If they said it was the duty of the people to rise up and throw off the chains of oppression of our current government, you could be in substantial trouble. Up to 20 years worth in prison.
From 18 U.S.C. §2385 (as of Jan. 2, 2001)
Whoever, with intent to cause the overthrow or destruction of any such government, prints, publishes, edits, issues, circulates, sells, distributes, or publicly displays any written or printed matter advocating, advising, or teaching the duty, necessity, desirability, or propriety of overthrowing or destroying any government in the United States by force or violence, or attempts to do so;
Etc, etc.
Under the Smith act of 1940, you could be tossed in the can for just belonging to an organization that said it would be a good thing if SOMEONE (not necessarily you) overthrew the government.
54 Stat. 670, 671, title I, §§2-3 (June 28, 1940)
Sec. 2. (a) It shall be unlawful for any person–
(1) to knowingly or willfully advocate, abet, advise, or teach the duty, necessity, desirability, or propriety of overthrowing or destroying any government in the United States by force or violence, or by the assassination of any officer of any such government;
That “desirability” clause is a crusher.
I have found mention on the web that that Supreme Court modified this standard in 1957 to require active participation in or encouragement of acts to overthrow the government to invoke the Smith act, but this contradicts their actions in 1961 on the Scales case, so I’m going to ask if one of our more knowledgeable posters can clear this up for us.
Scales was sent to prison because he was a member of the Communist Party, and the Supreme Court upheld the conviction 5-4. Kennedy had to pardon the man to get him out of prison.