her statements are not seditious. sheehan does not advocate the violent overthrow of the the US Gov't. she merely states what she thinks about the war, its supporters and its causes. so what? q.v. USC TITLE 18,CHAPTER 115 TREASON, SEDITION, AND SUBVERSIVE ACTIVITIES.
Why are there so many people here freaked out by mere words?
"Why are there so many people here freaked out by mere words?"
Much of the law you just cited is about "mere words."
Why are you freaked out by Sam Hill's questions? They are, after all, just words.
(Rush Limbaughs' example of illustrating the absurd by being absurd)
I suggest you read some caselaw, or simply look in Black's Law Dictionary. You can indeed provide aid and comfort to the enemy without actually fighting for them in the field. That's EXACTLY what Sheehan is trying to do...she's trying to destroy the American will to fight. That is an action that benefits the enemy.