The story is still breaking, but it looks like Bradley Manning was just convicted of espionage but not convicted of aiding the enemy.
I know it won’t make me popular with fellow libertarians, but I think the verdict is reasonable and it’s easy to see why when you contrast his behavior against Edward Snowden. Snowden blew the whistle on very specific programs he believed were violating the Constitutional rights of Americans. Manning dumped a whole bunch of documents. Some of these contained embarrassing information or showed lousy behavior; most of it he clearly had not even reviewed. It’s one thing to break secrecy when you think our citizens’s lives are being violated; it’s another to break it just for the sake of breaking it. (You can see my take on some of the more explosive Manning allegations here).
Snowden has been careful about releasing information with compromising national security (so far). Reports that he has turned over classified info to the Chinese and Russians are unverified at this point but would obviously change the equation. But Manning dumped everything to Wikileaks and there is evidence that insufficient vetting has cost the US dearly and cost some our allies their lives.
Whatever evils you may attribute to our government, they do not make Manning’s indiscriminate leaking of classified and secret information justifiable.
However, it does not appear that he was deliberately aiding Al-Qaeda or any of our enemies. So not convicting him of the more serious charge (which would have been the Civil War) seems reasonable.