[D]uring a public rally on the Washington Monument grounds [in 1966, t]he crowd present broke up into small discussion groups and petitioner joined a gathering scheduled to discuss police brutality. Most of those in the group were quite young, either in their teens or early twenties. Petitioner, who himself was 18 years old, entered into the discussion after one member of the group suggested that the young people present should get more education before expressing their views.

[P]etitioner responded: “They always holler at us to get an education. And now I have already received my draft classification as 1-A and I have got to report for my physical this Monday coming. I am not going. If they ever make me carry a rifle the first man I want to get in my sights is L.B.J.” “They are not going to make me kill my black brothers.” On the basis of this statement, the jury found that petitioner had committed a felony by knowingly and willfully threatening the President.