Who committed treason first, though?
Bradley Manning was the only person committing treason.
Actually, can you please explain why exposing someone in government who has done something illegal a treason? Why was exposing the people who outed Vallerie Plame treason? Why was exposing that Ronald Reagan was secretly selling weapons to terrorists in order to fund a private secret war treason? Why was exposing that IRS was targeting Tea Party members treason? Why did the entire Senate commit treason when they exposed Bill Clinton's private sexual relationship?
Or, do you even know what Bradley Manning actually did?
Bradley Manning did not release any Top Secret information. The Cables were not Top Secret.
That is not to say what he did was right, but how is it treason? It's not even the worst espionage in US history if you want to call it that. The only case for calling it espionage is the fact that Julian Assange is an austrlian so maybe it could be viewed like that but why would it be treason when that kind of stuff goes on all the time and no one else has been charged with treason or espionage even?