These Senators are in violation of Title 1 of the Smith Act as outlines below:
"Title I. Subversive activities. The Smith Act set federal criminal penalties that included fines or imprisonment for as long as twenty years and denied all employment by the federal government for five years following a conviction for anyone who:
...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; or...
See More: http://en.wikipedia.org/wiki/Smith_Act