For get libel. How about treason?
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 Repealed.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.