[Poohbah]

I believe it is possible to aid and comfort enemies of the U.S. without falling within the U.S. legal definition of "treason."

Perhaps you are merely ignorant: giving aid and comfort to the enemies of the United States IS the legal definition of treason, per Article III, Section 3 of the U.S. Constitution.

[aristeides]

Courts have held, for example, that the U.S. needs to be at war with the enemy in question before a person can be guilty of treason, in the legal sense. I'm a lawyer, and I repeat, it seems perfectly possible to me for someone to give aid and comfort to an enemy of the U.S. in a situation where a court will not find that the person is guilty of treason. For example, the U.S. may not happen to be in a state of war with that enemy.