Bradley Manning’s case is about more than freedom of speech
newstatesman.com
newstatesman.com
That's not what treason is in the USA. Treason is defined in the US Constitution as such:
"Treason against the United States, shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort. No Person shall be convicted of Treason unless on the Testimony of two Witnesses to the same overt Act, or on Confession in open Court."