Sedition? No, that doesn't work either. All because the demonflops blocked any consideration of a declaration of war.
Even with a declaration, it wouldn't be treason. It would fall into sedition, however, and that is still very serious.
Now if actual combat operations were going on, and his remarks led to violence in this country, treason could be arguable.
So, even if there is an 'official' declaration of war against Iraq, supporting the enemy from within the United States is not treason if it doesn't lead to violence?
If this guy keeps this up, he will cause such a resentment in America that there will be real problems.
What a terrible person he is.