When, if ever, was the last American convicted of sedition?

One Internet source (vaguely and broadly) defines sedition as: “An illegal action inciting resistance to lawful authority and tending to cause the disruption or overthrow of the government.”

Says another: “Actions or words intended to provoke or incite rebellion against government authority, or actual rebellion against government authority.”

According to Wikipedia, under the Alien and Sedition Acts of 1798, “anyone ‘opposing or resisting any law of the United States, or any act of the President of the United States’ could be imprisoned for up to two years. It was also illegal to “write, print, utter, or publish” anything critical of the president or Congress.” [snip] “The Sedition Act was set to expire in 1801, coinciding with the end of the Adams administration. While this prevented its constitutionality from being directly decided by the Supreme Court, subsequent mentions of the Sedition Act in Supreme Court opinions have assumed that it would be unconstitutional today.”

QUESTION: When, if ever, was the last American found guilty of sedition? What was the actual offense?

Well, the t’d probably be someone convicted under the Sedition Act of 1918. The most notable person prosecuted under it would probably be Eugene Debs.

I can’t tell if sedition, under that name, is still a crime in the U.S. except for military personnel. But there is a federal crime called “seditious conspiracy” which seems to amount to the same thing. Several terrorists have been convicted of that in recent decades, including members of FALN, a violent Puerto Rican independence movement (1981 - 1988), and also the Islamist terrorists behind the first World Trade Center bombing in the 1998.

The Montana Sedition Project