Here’s a link to US criminal codes that deal with such issues.
http://www.access.gpo.gov/uscode/title18/parti_chapter115_.html
* Sec. 2381. Treason.
* Sec. 2382. Misprision of treason.
* Sec. 2383. Rebellion or insurrection.
* Sec. 2384. Seditious conspiracy.
* Sec. 2385. Advocating overthrow of Government.
* Sec. 2386. Registration of certain organizations.
* Sec. 2387. Activities affecting armed forces generally.
* Sec. 2388. Activities affecting armed forces during war.
* Sec. 2389. Recruiting for service against United States.
* Sec. 2390. Enlistment to serve against United States.
* Sec. 2391. Repealed.
Another freeper posted the link or one very much like it on another thread awhile back. Maybe one of our resident legal eagles can find something to work with.
And then there’s sedition which is a whole other ballgame.